Liquid Argon Research Papers - Academia.edu (original) (raw)

12 Followers

Recent papers in Liquid Argon

There is a wealth of evidence that the majority of the matter in the universe is composed of non-baryonic dark matter. One candidate for dark matter is weakly interacting massive particle (WIMP). There are many detectors searching for... more

There is a wealth of evidence that the majority of the matter in the universe is composed of non-baryonic dark matter. One candidate for dark matter is weakly interacting massive particle (WIMP). There are many detectors searching for evidence of WIMP particle interaction. A common active medium is a liquid argon. Argon, like all noble elements, is a scintillator, meaning it produces light when exposed to radiation. Within these large, liquid argon detectors, one method of determining the signi cance of the event is by determining the event location. This involves a deep understanding of how the scintillation
light optically propagates through the detector, including the Rayleigh scattering length. The Rayleigh scattering length of liquid argon was formerly contention, as experimental results did not agree with a theoretical calculation. We will discuss an update calculation
of the wavelength dependent scattering in argon using historical measurements. These calculations were tested using an experimental test stand, designed and constructed at Royal Holloway. This will show that the scattering length of the scintillation light of
liquid argon is 58 cm.

The DØ experiment enjoyed a very successful data-collection run at the Fermilab Tevatron collider between 1992 and 1996. Since then, the detector has been upgraded to take advantage of improvements to the Tevatron and to enhance ...

The aim of the ArDM project is the development and operation of a one ton double-phase liquid argon detector for direct Dark Matter searches. The detector measures both the scintillation light and the ionization charge from ionizing... more

The aim of the ArDM project is the development and operation of a one ton double-phase liquid argon detector for direct Dark Matter searches. The detector measures both the scintillation light and the ionization charge from ionizing radiation using two independent readout systems. This paper briefly describes the detector concept and presents preliminary results from the ArDM R&D program, including

The aim of the ArDM project is the development and operation of a one ton double-phase liquid argon detector for direct Dark Matter searches. The detector measures both the scintillation light and the ionization charge from ionizing... more

The aim of the ArDM project is the development and operation of a one ton double-phase liquid argon detector for direct Dark Matter searches. The detector measures both the scintillation light and the ionization charge from ionizing radiation using two independent readout systems. This paper briefly describes the detector concept and presents preliminary results from the ArDM R&D program, including

We have previously reported on the construction and successful operation of the novel double phase Liquid Argon Large Electron Multiplier Time Projection Chamber (LAr LEM-TPC). This detector concept provides a 3D-tracking and calorimetric... more

We have previously reported on the construction and successful operation of the novel double phase Liquid Argon Large Electron Multiplier Time Projection Chamber (LAr LEM-TPC). This detector concept provides a 3D-tracking and calorimetric device capable of adjustable charge amplification, a promising readout technology for next generation neutrino detectors and direct Dark Matter searches. In this paper, we report on the first operation of a LAr LEM-TPC prototype equipped with a single 1mm thick LEM amplifying stage and a 2D projective readout anode. The active area of the detector is 10×10cm2 and the drift length is 21cm. Cosmic muon events were collected, fully reconstructed and used to characterize the performance of the chamber. The obtained signals provide images of very high quality and the energy loss distributions of minimum ionizing tracks give a direct estimate of the amplification. We find that a stable gain of ∼30 can be achieved with this detector configuration correspo...

At the beginning of 2010, we presented at the J-PARC PAC an R$&$D program towards large (100 kton scale) liquid argon TPCs, suitable to investigate, in conjunction with the J-PARC neutrino beam, the possibility of CP violation in the... more

At the beginning of 2010, we presented at the J-PARC PAC an R$&$D program towards large (100 kton scale) liquid argon TPCs, suitable to investigate, in conjunction with the J-PARC neutrino beam, the possibility of CP violation in the neutrino sector and to search for nucleon decay. As a first step we proposed a test experiment to identify and measure

There is wealth of evidence that the majority of the matter in the universe is composed of non-baryonic dark matter. One candidate for dark matter is weakly interacting massive particle (WIMP). There are many detectors searching for... more

There is wealth of evidence that the majority of the matter in the universe is composed of non-baryonic dark matter. One candidate for dark matter is weakly interacting massive particle (WIMP). There are many detectors searching for evidence of WIMP particle interaction. A common active medium is liquid argon. Argon, like all noble elements is a scintillator, meaning it produces light when exposed to radiation. Within these large, liquid argon detectors, one method of determining the significance of the event is by determining the event location. This involves a deep understanding of how the scintillation light optically propagates through the detector, including the Rayleigh scattering length. The Rayleigh scattering length of liquid argon was formerly contention, as experimental results did not agree with a theoretical calculation. We will discuss an update calculation of the wavelength dependent scattering in argon using historical measurements. These calculations were tested usi...

The DØ experiment enjoyed a very successful data-collection run at the Fermilab Tevatron collider between 1992 and 1996. Since then, the detector has been upgraded to take advantage of improvements to the Tevatron and to enhance ...

The ionization signals in the liquid argon of the ATLAS electromagnetic calorimeter are studied in detail using cosmic muons. In particular, the drift time of the ionization electrons is measured and used to assess the intrinsic... more

The ionization signals in the liquid argon of the ATLAS electromagnetic calorimeter are studied in detail using cosmic muons. In particular, the drift time of the ionization electrons is measured and used to assess the intrinsic uniformity of the calorimeter gaps and estimate its impact on the constant term of the energy resolution. The drift times of electrons in the cells of the second layer of the calorimeter are uniform at the level of 1.3% in the barrel and 2.8% in the endcaps. This leads to an estimated contribution to the constant term of% ...

The large current of corona discharge in liquid Ar was measured as a function of tip voltage. Electric field in a gap is large enough to heat of electrons which are carriers of the current and their mobility depends on the field.... more

The large current of corona discharge in liquid Ar was measured as a function of tip voltage. Electric field in a gap is large enough to heat of electrons which are carriers of the current and their mobility depends on the field. Calculated electronic current is larger than that in the experiment. Capture of the electrons by attaching impurities are

Log In