Rachel Chechik - Academia.edu (original) (raw)

Papers by Rachel Chechik

Research paper thumbnail of Detection efficiency study of an imaging detector for low-energy neutrons

High accuracy imaging of thermal neutrons has been demonstrated with detectors having solid conve... more High accuracy imaging of thermal neutrons has been demonstrated with detectors having solid converters coated with secondary electron emitters and coupled to gaseous electron multipliers. The present work concentrates on study of the neutron detection efficiency of detectors equipped with composite CsI coated 6Li neutron converters. Monte Carlo simulations of the neutron conversion and the charged particle and electron emission

Research paper thumbnail of Large-area high-resolution thermal neutron imaging detectors

We have developed a high resolution thermal neutron imaging detector, combining a composite solid... more We have developed a high resolution thermal neutron imaging detector, combining a composite solid neutron convertor and a low-pressure gaseous avalanche electron multiplier. Neutron-induced charged particles from a primary convertor element induce multiple low- energy secondary electrons from a second electron-emissive film. These are multiplied in the gas upon their emission. A localization resolution of the order of 0.5 mm

Research paper thumbnail of Large-area imaging detector for neutron scattering based on boron-rich liquid scintillator

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2003

We discuss a new thermal-neutron imaging detector that combines a neutron converter coupled to a ... more We discuss a new thermal-neutron imaging detector that combines a neutron converter coupled to a position-sensitive gaseous photodetector. The neutron converter consists of a thin (0.5 mm) layer of boron-rich liquid scintillator. It is viewed by an atmospheric -pressure, gas-avalanche photomultiplier with a bi-alkali photocathode. Scintillation-induced photoelectrons are multiplied by a cascade of Gas Electron Multipliers (GEM). The multi-GEM supplies the pulse-height, time and position information for each converted neutron. Such a fast, large -area detector can operate at high radiation flux.

Research paper thumbnail of Investigations of a THGEM-based imaging detector

Journal of Instrumentation, 2007

We present the results of our recent studies on a Thick Gas Electron Multiplier (THGEM)-based ima... more We present the results of our recent studies on a Thick Gas Electron Multiplier (THGEM)-based imaging detector prototype. It consists of two 100 × 100 mm 2 THGEM electrodes in cascade, coupled to a resistive anode. The event location is recorded with a 2D double-sided readout electrode equipped with discrete delay-lines and dedicated electronics. The THGEM electrodes, produced by standard printed-circuit board and mechanical drilling techniques, a 0.4 mm thick with 0.5 mm diameter holes spaced by 1 mm. Localization resolutions of about 0.7 mm (FWHM) were measured with soft x-rays, in a detector operated with atmospheric-pressure Ar/CH 4 ; good linearity and homogeneity were achieved. We describe the imaging-detector layout, the resistive-anode 2D readout system and the imaging properties. The THGEM has numerous potential applications that require large-area imaging detectors, with high-rate capability, single-electron sensitivity and moderate (sub-mm) localization resolution.

Research paper thumbnail of 2007 NIM A 572 175-176 Advances Iimaging THGEM-based detectors

We report on recent measurements with Thick GEM-like (THGEM)-based imaging detectors. The THGEM i... more We report on recent measurements with Thick GEM-like (THGEM)-based imaging detectors. The THGEM is a robust gaseous electron multiplier similar to GEM but with larger dimensions. It has high electron multiplication, of 10 5 and 10 7 in single-and double-THGEM structure, respectively, fast signals and $10 MHz=mm 2 counting rate capability. It can be produced in any shape and over large area. In view of many possible applications of THGEM-based imaging detectors, in particle physics and beyond, we have recently studied the localization properties of a 2D 10 Â 10 cm 2 detector. The results of these studies are presented. r

Research paper thumbnail of <title>Large-area high-resolution thermal neutron imaging detectors</title>

International Conference on Neutrons and Their Applications, 1995

ABSTRACT

Research paper thumbnail of <title>Detection efficiency study of an imaging detector for low-energy neutrons</title>

International Conference Neutrons in Research and Industry, 1997

ABSTRACT High accuracy imaging of thermal neutrons has been demonstrated with detectors having so... more ABSTRACT High accuracy imaging of thermal neutrons has been demonstrated with detectors having solid converters coated with secondary electron emitters and coupled to gaseous electron multipliers. The present work concentrates on study of the neutron detection efficiency of detectors equipped with composite CsI coated 6Li neutron converters. Monte Carlo simulations of the neutron conversion and the charged particle and electron emission processes permit to optimize the converter parameters. The experimental study of the detection efficiency is described in detail and the results are compared with the theoretical predictions.

Research paper thumbnail of Calculation of proton stopping power in the region of its maximum value for several organic materials and water

The stopping powers for 10 solid organic materials and water have been calculated in the range of... more The stopping powers for 10 solid organic materials and water have been calculated in the range of proton energies 50-500 keV. Most of the presented results are new and are in good agreement with existing experimental data .The calculated data might be useful for applications in radiobiology and space research.

Research paper thumbnail of Novel high pressure gas scintillation x-ray detector with fast timing properties and high Compton suppression capability

Title: Novel high pressure gas scintillation x-ray detector with fast timing properties and high ... more Title: Novel high pressure gas scintillation x-ray detector with fast timing properties and high Compton suppression capability. Authors: Dangendorf, Volker; Schmidt-Boecking, Horst W.; Breskin, Amos; Chechik, Rachel. Affiliation: AA(Univ. ...

Research paper thumbnail of Advances in Thick GEM-like (THGEM) multipliers

The concept and properties of the novel and robust Thick GEM-like (THGEM) hole-multiplier, econom... more The concept and properties of the novel and robust Thick GEM-like (THGEM) hole-multiplier, economically produced by standard printed-circuit techniques, is presented. It has a GEM-like structure and operation mode, with dimensions expended to the sub-mm to mm scales, and mechanically-drilled holes etched at their rim. Very high electron multiplication, 10^5 and 10^7 in single- and double-THGEM elements were reached; very

Research paper thumbnail of Thick GEM-like (THGEM) detectors and their possible applications

Thick GEM-like (THGEM) electrodes are robust, high gain gaseous electron multipliers, economicall... more Thick GEM-like (THGEM) electrodes are robust, high gain gaseous electron multipliers, economically-manufactured by standard drilling and etching of thin printed circuit board or other materials. Their operation and structure are similar to that of standard GEMs but with 5 to 20-fold expanded dimensions. Due to the larger hole dimensions they provide up to 10^5 and 10^7 charge multiplication, in a

Research paper thumbnail of <title>A Novel High Pressure Gas Scintillation X-Ray Detector With Fast Timing Properties And High Compton Suppression Capability</title>

EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy and Atomic Physics, 1989

ABSTRACT

Research paper thumbnail of Operation of MHSP multipliers in high pressure pure noble-gas

Journal of Instrumentation, 2006

We report on the performance of a Micro-Hole & Strip Plate (MHSP) electron multiplier operating i... more We report on the performance of a Micro-Hole & Strip Plate (MHSP) electron multiplier operating in pure Xe, Kr, Ar and Ne at the pressure range of 1 to 6 bar. The maximal gains at 1 bar Xe and Kr are 5x10 4 and 10 5 , respectively; they drop by about one order of magnitude at 2 bar and by almost another order of magnitude at 5-6 bar; they reach gains of 500 and 4000 at 5 bar in Xe and Kr, respectively. In Ar, the gain varies very little with pressure, being 3-9 x 10 3 ; in Ne the maximum attainable gain, about 10 5 , is pressure independent above 2 bar. The results are compared with that of single-and triple-GEM multipliers operated in similar conditions. Potential applications are in hard X-ray imaging and in cryogenic radiation detectors.

Research paper thumbnail of Advances in the Micro-Hole & Strip Plate gaseous detector

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2003

We report on the performance of a new gaseous electron multiplier: the Micro-Hole & Strip Plate (... more We report on the performance of a new gaseous electron multiplier: the Micro-Hole & Strip Plate (MHSP). It consists of two independent charge-amplification stages in a single, double-sided micro-structured electrode, deposited on a thin insulating substrate. Charge gains in excess of 10 3 were obtained in a MHSP operated with soft X-rays in Ar/CO 2 (70/ 30). We present the results of a systematic study of the MHSP properties and those of a double-stage GEM+MHSP multiplier. Applications to gaseous photomultipliers are discussed. r

Research paper thumbnail of X-ray and UV detection with the Micro-Hole & Strip plate gaseous detector

Proceedings of SPIE - The International Society for Optical Engineering, 2005

ABSTRACT We present a review on the research carried out with the Micro-Hole &amp; Strip plat... more ABSTRACT We present a review on the research carried out with the Micro-Hole &amp; Strip plate (MHSP) gaseous electron multiplier. In this new device charge multiplication occurs in two stages: radiation-induced electrons are multiplied in small holes and the resulting avalanche is further multiplied on anode strips patterned on the multiplier&#39;s bottom electrode. This structure provides fast multiplication process, has a high total gain even in noble gas mixtures and provides good localization properties. Detectors based on this principle have shown gains above 104 and energy resolution of about 14% for 5.9-keV X-rays; large gains were obtained at high gas pressures as well, allowing for efficient detection of higher-energy X-rays. The properties of UV-photon detectors comprising an MHSP coupled to semitransparent CsI photocathodes or with reflective ones deposited on the multiplier&#39;s top surface were investigated. The operation mechanism of these detectors and their most significant results are presented.

Research paper thumbnail of Single-UV-photon 2-D imaging with multi-GEM detectors

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2007

The main goal being the construction of large-area, low-cost position-sensitive micropattern gase... more The main goal being the construction of large-area, low-cost position-sensitive micropattern gaseous photomultipliers (GPMs) based on gas electron multipliers (GEM) cascades, we have studied the single-photon imaging capabilities of a 4-GEM GPM with a reflective CsI-photocathode deposited on the top surface of the 1st GEM. The charge readout was performed with a simple/economic Wedge and Strip (W&S) readout electrode, using pulses induced through a resistive electrode. We have demonstrated the feasibility of single-photon imaging GPM with sub-millimeter resolution; single-photon spatial resolutions as small as 150mm(FWHM),i.e.150 mm (FWHM), i.e. 150mm(FWHM),i.e.65 mm (RMS), were measured in Ar/5%CH 4 gas mixture at atmospheric pressure. r

Research paper thumbnail of Ion-counting nanodosemeter with particle tracking capabilities

Radiation Protection Dosimetry, 2007

An ion-counting nanodosemeter (ND) yielding the distribution of radiation-induced ions in a low-p... more An ion-counting nanodosemeter (ND) yielding the distribution of radiation-induced ions in a low-pressure gas within a millimetric, wall-less sensitive volume (SV) was equipped with a silicon microstrip telescope that tracks the primary particles, allowing correlation of nanodosimetric data with particle position relative to the SV. The performance of this tracking ND was tested with a broad 250 MeV proton beam at Loma Linda University Medical Center. The high-resolution tracking capability made it possible to map the ion registration efficiency distribution within the SV, for which only calculated data were available before. It was shown that tracking information combined with nanodosimetric data can map the ionisation pattern of track segments within 150 nm-equivalent long SVs with a longitudinal resolution of $5 tissue-equivalent nanometers. Data acquired in this work were compared with results of Monte Carlo track structure simulations. The good agreement between 'tracking nanodosimetry' data acquired with the new system and simulated data supports the application of ion-counting nanodosimetry in experimental track-structure studies.

Research paper thumbnail of CsI-THGEM gaseous photomultipliers for RICH and noble-liquid detectors

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2011

The properties of UV-photon imaging detectors consisting of CsI-coated THGEM electron multipliers... more The properties of UV-photon imaging detectors consisting of CsI-coated THGEM electron multipliers are summarized. New results related to detection of Cherenkov light (RICH) and scintillation photons in noble liquid are presented.

Research paper thumbnail of A large volume 3D imaging gas scintillation counter with CsI-based wire chamber readout

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1994

We report on a large volume, high-pressure, TPC-like xenon gas scintillation counter for X-ray sp... more We report on a large volume, high-pressure, TPC-like xenon gas scintillation counter for X-ray spectroscopy in the range 60-511 keV. The UV scintillation light is detected with a low-pressure two stage proportional counter using a Csl photocathode. The detector has excellent energy and time resolutions. The location of the absorbed quanta can be accurately determined in all three dimensions. Furthermore the 3D topological information of the deposited primary charges provides an efficient means for the suppression of the Compton background present in many close ion-atom collision experiments.

Research paper thumbnail of A gas-filled UV-photon detector with CsI photocathode for the detection of Xe light

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1990

Xe-scintillation UV photons are detected with a CsI photocathode coupled to a double-stage low-pr... more Xe-scintillation UV photons are detected with a CsI photocathode coupled to a double-stage low-pressure wire chamber. At 20 Torr of Ch4 the quantum efficiency of the photocathode is 9%. The combination of a gas scintillation chamber with the solid photocathode avalanche chamber (SPAC) yields an energy resolution of 4.1% (FWHM) for 60 keV X-rays. The stability of the photocathode is

Research paper thumbnail of Detection efficiency study of an imaging detector for low-energy neutrons

High accuracy imaging of thermal neutrons has been demonstrated with detectors having solid conve... more High accuracy imaging of thermal neutrons has been demonstrated with detectors having solid converters coated with secondary electron emitters and coupled to gaseous electron multipliers. The present work concentrates on study of the neutron detection efficiency of detectors equipped with composite CsI coated 6Li neutron converters. Monte Carlo simulations of the neutron conversion and the charged particle and electron emission

Research paper thumbnail of Large-area high-resolution thermal neutron imaging detectors

We have developed a high resolution thermal neutron imaging detector, combining a composite solid... more We have developed a high resolution thermal neutron imaging detector, combining a composite solid neutron convertor and a low-pressure gaseous avalanche electron multiplier. Neutron-induced charged particles from a primary convertor element induce multiple low- energy secondary electrons from a second electron-emissive film. These are multiplied in the gas upon their emission. A localization resolution of the order of 0.5 mm

Research paper thumbnail of Large-area imaging detector for neutron scattering based on boron-rich liquid scintillator

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2003

We discuss a new thermal-neutron imaging detector that combines a neutron converter coupled to a ... more We discuss a new thermal-neutron imaging detector that combines a neutron converter coupled to a position-sensitive gaseous photodetector. The neutron converter consists of a thin (0.5 mm) layer of boron-rich liquid scintillator. It is viewed by an atmospheric -pressure, gas-avalanche photomultiplier with a bi-alkali photocathode. Scintillation-induced photoelectrons are multiplied by a cascade of Gas Electron Multipliers (GEM). The multi-GEM supplies the pulse-height, time and position information for each converted neutron. Such a fast, large -area detector can operate at high radiation flux.

Research paper thumbnail of Investigations of a THGEM-based imaging detector

Journal of Instrumentation, 2007

We present the results of our recent studies on a Thick Gas Electron Multiplier (THGEM)-based ima... more We present the results of our recent studies on a Thick Gas Electron Multiplier (THGEM)-based imaging detector prototype. It consists of two 100 × 100 mm 2 THGEM electrodes in cascade, coupled to a resistive anode. The event location is recorded with a 2D double-sided readout electrode equipped with discrete delay-lines and dedicated electronics. The THGEM electrodes, produced by standard printed-circuit board and mechanical drilling techniques, a 0.4 mm thick with 0.5 mm diameter holes spaced by 1 mm. Localization resolutions of about 0.7 mm (FWHM) were measured with soft x-rays, in a detector operated with atmospheric-pressure Ar/CH 4 ; good linearity and homogeneity were achieved. We describe the imaging-detector layout, the resistive-anode 2D readout system and the imaging properties. The THGEM has numerous potential applications that require large-area imaging detectors, with high-rate capability, single-electron sensitivity and moderate (sub-mm) localization resolution.

Research paper thumbnail of 2007 NIM A 572 175-176 Advances Iimaging THGEM-based detectors

We report on recent measurements with Thick GEM-like (THGEM)-based imaging detectors. The THGEM i... more We report on recent measurements with Thick GEM-like (THGEM)-based imaging detectors. The THGEM is a robust gaseous electron multiplier similar to GEM but with larger dimensions. It has high electron multiplication, of 10 5 and 10 7 in single-and double-THGEM structure, respectively, fast signals and $10 MHz=mm 2 counting rate capability. It can be produced in any shape and over large area. In view of many possible applications of THGEM-based imaging detectors, in particle physics and beyond, we have recently studied the localization properties of a 2D 10 Â 10 cm 2 detector. The results of these studies are presented. r

Research paper thumbnail of <title>Large-area high-resolution thermal neutron imaging detectors</title>

International Conference on Neutrons and Their Applications, 1995

ABSTRACT

Research paper thumbnail of <title>Detection efficiency study of an imaging detector for low-energy neutrons</title>

International Conference Neutrons in Research and Industry, 1997

ABSTRACT High accuracy imaging of thermal neutrons has been demonstrated with detectors having so... more ABSTRACT High accuracy imaging of thermal neutrons has been demonstrated with detectors having solid converters coated with secondary electron emitters and coupled to gaseous electron multipliers. The present work concentrates on study of the neutron detection efficiency of detectors equipped with composite CsI coated 6Li neutron converters. Monte Carlo simulations of the neutron conversion and the charged particle and electron emission processes permit to optimize the converter parameters. The experimental study of the detection efficiency is described in detail and the results are compared with the theoretical predictions.

Research paper thumbnail of Calculation of proton stopping power in the region of its maximum value for several organic materials and water

The stopping powers for 10 solid organic materials and water have been calculated in the range of... more The stopping powers for 10 solid organic materials and water have been calculated in the range of proton energies 50-500 keV. Most of the presented results are new and are in good agreement with existing experimental data .The calculated data might be useful for applications in radiobiology and space research.

Research paper thumbnail of Novel high pressure gas scintillation x-ray detector with fast timing properties and high Compton suppression capability

Title: Novel high pressure gas scintillation x-ray detector with fast timing properties and high ... more Title: Novel high pressure gas scintillation x-ray detector with fast timing properties and high Compton suppression capability. Authors: Dangendorf, Volker; Schmidt-Boecking, Horst W.; Breskin, Amos; Chechik, Rachel. Affiliation: AA(Univ. ...

Research paper thumbnail of Advances in Thick GEM-like (THGEM) multipliers

The concept and properties of the novel and robust Thick GEM-like (THGEM) hole-multiplier, econom... more The concept and properties of the novel and robust Thick GEM-like (THGEM) hole-multiplier, economically produced by standard printed-circuit techniques, is presented. It has a GEM-like structure and operation mode, with dimensions expended to the sub-mm to mm scales, and mechanically-drilled holes etched at their rim. Very high electron multiplication, 10^5 and 10^7 in single- and double-THGEM elements were reached; very

Research paper thumbnail of Thick GEM-like (THGEM) detectors and their possible applications

Thick GEM-like (THGEM) electrodes are robust, high gain gaseous electron multipliers, economicall... more Thick GEM-like (THGEM) electrodes are robust, high gain gaseous electron multipliers, economically-manufactured by standard drilling and etching of thin printed circuit board or other materials. Their operation and structure are similar to that of standard GEMs but with 5 to 20-fold expanded dimensions. Due to the larger hole dimensions they provide up to 10^5 and 10^7 charge multiplication, in a

Research paper thumbnail of <title>A Novel High Pressure Gas Scintillation X-Ray Detector With Fast Timing Properties And High Compton Suppression Capability</title>

EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy and Atomic Physics, 1989

ABSTRACT

Research paper thumbnail of Operation of MHSP multipliers in high pressure pure noble-gas

Journal of Instrumentation, 2006

We report on the performance of a Micro-Hole & Strip Plate (MHSP) electron multiplier operating i... more We report on the performance of a Micro-Hole & Strip Plate (MHSP) electron multiplier operating in pure Xe, Kr, Ar and Ne at the pressure range of 1 to 6 bar. The maximal gains at 1 bar Xe and Kr are 5x10 4 and 10 5 , respectively; they drop by about one order of magnitude at 2 bar and by almost another order of magnitude at 5-6 bar; they reach gains of 500 and 4000 at 5 bar in Xe and Kr, respectively. In Ar, the gain varies very little with pressure, being 3-9 x 10 3 ; in Ne the maximum attainable gain, about 10 5 , is pressure independent above 2 bar. The results are compared with that of single-and triple-GEM multipliers operated in similar conditions. Potential applications are in hard X-ray imaging and in cryogenic radiation detectors.

Research paper thumbnail of Advances in the Micro-Hole & Strip Plate gaseous detector

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2003

We report on the performance of a new gaseous electron multiplier: the Micro-Hole & Strip Plate (... more We report on the performance of a new gaseous electron multiplier: the Micro-Hole & Strip Plate (MHSP). It consists of two independent charge-amplification stages in a single, double-sided micro-structured electrode, deposited on a thin insulating substrate. Charge gains in excess of 10 3 were obtained in a MHSP operated with soft X-rays in Ar/CO 2 (70/ 30). We present the results of a systematic study of the MHSP properties and those of a double-stage GEM+MHSP multiplier. Applications to gaseous photomultipliers are discussed. r

Research paper thumbnail of X-ray and UV detection with the Micro-Hole & Strip plate gaseous detector

Proceedings of SPIE - The International Society for Optical Engineering, 2005

ABSTRACT We present a review on the research carried out with the Micro-Hole &amp; Strip plat... more ABSTRACT We present a review on the research carried out with the Micro-Hole &amp; Strip plate (MHSP) gaseous electron multiplier. In this new device charge multiplication occurs in two stages: radiation-induced electrons are multiplied in small holes and the resulting avalanche is further multiplied on anode strips patterned on the multiplier&#39;s bottom electrode. This structure provides fast multiplication process, has a high total gain even in noble gas mixtures and provides good localization properties. Detectors based on this principle have shown gains above 104 and energy resolution of about 14% for 5.9-keV X-rays; large gains were obtained at high gas pressures as well, allowing for efficient detection of higher-energy X-rays. The properties of UV-photon detectors comprising an MHSP coupled to semitransparent CsI photocathodes or with reflective ones deposited on the multiplier&#39;s top surface were investigated. The operation mechanism of these detectors and their most significant results are presented.

Research paper thumbnail of Single-UV-photon 2-D imaging with multi-GEM detectors

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2007

The main goal being the construction of large-area, low-cost position-sensitive micropattern gase... more The main goal being the construction of large-area, low-cost position-sensitive micropattern gaseous photomultipliers (GPMs) based on gas electron multipliers (GEM) cascades, we have studied the single-photon imaging capabilities of a 4-GEM GPM with a reflective CsI-photocathode deposited on the top surface of the 1st GEM. The charge readout was performed with a simple/economic Wedge and Strip (W&S) readout electrode, using pulses induced through a resistive electrode. We have demonstrated the feasibility of single-photon imaging GPM with sub-millimeter resolution; single-photon spatial resolutions as small as 150mm(FWHM),i.e.150 mm (FWHM), i.e. 150mm(FWHM),i.e.65 mm (RMS), were measured in Ar/5%CH 4 gas mixture at atmospheric pressure. r

Research paper thumbnail of Ion-counting nanodosemeter with particle tracking capabilities

Radiation Protection Dosimetry, 2007

An ion-counting nanodosemeter (ND) yielding the distribution of radiation-induced ions in a low-p... more An ion-counting nanodosemeter (ND) yielding the distribution of radiation-induced ions in a low-pressure gas within a millimetric, wall-less sensitive volume (SV) was equipped with a silicon microstrip telescope that tracks the primary particles, allowing correlation of nanodosimetric data with particle position relative to the SV. The performance of this tracking ND was tested with a broad 250 MeV proton beam at Loma Linda University Medical Center. The high-resolution tracking capability made it possible to map the ion registration efficiency distribution within the SV, for which only calculated data were available before. It was shown that tracking information combined with nanodosimetric data can map the ionisation pattern of track segments within 150 nm-equivalent long SVs with a longitudinal resolution of $5 tissue-equivalent nanometers. Data acquired in this work were compared with results of Monte Carlo track structure simulations. The good agreement between 'tracking nanodosimetry' data acquired with the new system and simulated data supports the application of ion-counting nanodosimetry in experimental track-structure studies.

Research paper thumbnail of CsI-THGEM gaseous photomultipliers for RICH and noble-liquid detectors

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2011

The properties of UV-photon imaging detectors consisting of CsI-coated THGEM electron multipliers... more The properties of UV-photon imaging detectors consisting of CsI-coated THGEM electron multipliers are summarized. New results related to detection of Cherenkov light (RICH) and scintillation photons in noble liquid are presented.

Research paper thumbnail of A large volume 3D imaging gas scintillation counter with CsI-based wire chamber readout

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1994

We report on a large volume, high-pressure, TPC-like xenon gas scintillation counter for X-ray sp... more We report on a large volume, high-pressure, TPC-like xenon gas scintillation counter for X-ray spectroscopy in the range 60-511 keV. The UV scintillation light is detected with a low-pressure two stage proportional counter using a Csl photocathode. The detector has excellent energy and time resolutions. The location of the absorbed quanta can be accurately determined in all three dimensions. Furthermore the 3D topological information of the deposited primary charges provides an efficient means for the suppression of the Compton background present in many close ion-atom collision experiments.

Research paper thumbnail of A gas-filled UV-photon detector with CsI photocathode for the detection of Xe light

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1990

Xe-scintillation UV photons are detected with a CsI photocathode coupled to a double-stage low-pr... more Xe-scintillation UV photons are detected with a CsI photocathode coupled to a double-stage low-pressure wire chamber. At 20 Torr of Ch4 the quantum efficiency of the photocathode is 9%. The combination of a gas scintillation chamber with the solid photocathode avalanche chamber (SPAC) yields an energy resolution of 4.1% (FWHM) for 60 keV X-rays. The stability of the photocathode is