A. Lombardi - Academia.edu (original) (raw)

Papers by A. Lombardi

Research paper thumbnail of Transverse Emittance reconstruction in presence of space charge and application to the 50 MeV beam of Linac4

During the commissioning stage of Linac4 a test bench is planned to be used in order to character... more During the commissioning stage of Linac4 a test bench is planned to be used in order to characterize the 50 MeV beam after the DTL. Among other parameters, it will be possible to measure the transverse emittance using both the 3 monitors and the quadrupole scan method. As the space charge effects are not negligible at this energy, classical techniques of emittance reconstruction become questionable and a different approach based on recursive beam dynamics simulations must be applied.

Research paper thumbnail of SPL Transfer Line

This is an internal CERN publication and does not necessarily reflect the view s of the CERN mana... more This is an internal CERN publication and does not necessarily reflect the view s of the CERN management. Summary The study of the longitudinal properties of the beam accelerated by SPL at the injection of the following accelerator is very important to optimize its performance. Therefore we connected the latest version of SPL (5 GeV) to the PS2 with a transfer line previously designed by the TE/ABT-BTP Section making it an example of how to transport the SPL beam out of the very densely built Meyrin site to a place where a following accelerator can be realized. 1. The SPL, the PS2 and the Transfer Line A study has been conducted [1] on the possibility to overcome the present injector chain limitations by replacing the present injectors Linac2, PS Booster and PS by a new linear H-accelerators, Linac4 and a Superconducting Proton Linac (SPL) [2], and a 50 GeV proton synchrotron (PS2) [3] (see Figure 1). Figure 1: Sketch of the Meyrin site present accelerators and transfer lines (in gre...

Research paper thumbnail of Linac4, a New Injector for the CERN PS Booster

The first bottle-neck towards higher beam brightness in the LHC injector chain is due to space ch... more The first bottle-neck towards higher beam brightness in the LHC injector chain is due to space charge induced tune spread at injection into the CERN PS Booster (PSB). A new injector called Linac4 is proposed to remove this limitation. Using RF cavities at 352 and 704 MHz, it will replace the present 50 MeV proton Linac2, and deliver a 160

Research paper thumbnail of Electron beam sensitivity study of the Los Alamos advanced free-electron laser beam line

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1992

This report was prepared as an account of work sponsored by an agency of the United States Govern... more This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completene_, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Byacceptanceof thisarticle,the publisherrecognizesthatthe U.S. Governmentretainsa nonexclusive, royalty-free licenseto publish or reproducethe published formof thiscontribution, or to allowothersto do so,for U.S. Governmentpurposes. The Los Alamos NalionalLaboraioryrequeststhat the publisheridentifythisarticleas workpedorrned und_ the auspicesoftheU.S. Departmentoi Energy.

Research paper thumbnail of A Large Hadron Electron Collider at CERNReport on the Physics and Design Concepts for Machine and Detector

Research paper thumbnail of Recent progress in neutrino factory and muon collider research within the Muon Collaboration

Physical Review Special Topics-accelerators and Beams, 2003

We describe the status of our effort to realize a first neutrino factory and the progress made in... more We describe the status of our effort to realize a first neutrino factory and the progress made in understanding the problems associated with the collection and cooling of muons towards that end.

Research paper thumbnail of Parametric study of a high current–density EBIS Charge Breeder regarding Two Stream plasma Instability (TSI)

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2016

Research paper thumbnail of Transverse Emittance reconstruction in presence of space charge and application to the 50 MeV beam of Linac4

During the commissioning stage of Linac4 a test bench is planned to be used in order to character... more During the commissioning stage of Linac4 a test bench is planned to be used in order to characterize the 50 MeV beam after the DTL. Among other parameters, it will be possible to measure the transverse emittance using both the 3 monitors and the quadrupole scan method. As the space charge effects are not negligible at this energy, classical techniques of emittance reconstruction become questionable and a different approach based on recursive beam dynamics simulations must be applied.

Research paper thumbnail of SPL Transfer Line

This is an internal CERN publication and does not necessarily reflect the view s of the CERN mana... more This is an internal CERN publication and does not necessarily reflect the view s of the CERN management. Summary The study of the longitudinal properties of the beam accelerated by SPL at the injection of the following accelerator is very important to optimize its performance. Therefore we connected the latest version of SPL (5 GeV) to the PS2 with a transfer line previously designed by the TE/ABT-BTP Section making it an example of how to transport the SPL beam out of the very densely built Meyrin site to a place where a following accelerator can be realized. 1. The SPL, the PS2 and the Transfer Line A study has been conducted [1] on the possibility to overcome the present injector chain limitations by replacing the present injectors Linac2, PS Booster and PS by a new linear H-accelerators, Linac4 and a Superconducting Proton Linac (SPL) [2], and a 50 GeV proton synchrotron (PS2) [3] (see Figure 1). Figure 1: Sketch of the Meyrin site present accelerators and transfer lines (in gre...

Research paper thumbnail of Linac4, a New Injector for the CERN PS Booster

The first bottle-neck towards higher beam brightness in the LHC injector chain is due to space ch... more The first bottle-neck towards higher beam brightness in the LHC injector chain is due to space charge induced tune spread at injection into the CERN PS Booster (PSB). A new injector called Linac4 is proposed to remove this limitation. Using RF cavities at 352 and 704 MHz, it will replace the present 50 MeV proton Linac2, and deliver a 160

Research paper thumbnail of Electron beam sensitivity study of the Los Alamos advanced free-electron laser beam line

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1992

This report was prepared as an account of work sponsored by an agency of the United States Govern... more This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completene_, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. Byacceptanceof thisarticle,the publisherrecognizesthatthe U.S. Governmentretainsa nonexclusive, royalty-free licenseto publish or reproducethe published formof thiscontribution, or to allowothersto do so,for U.S. Governmentpurposes. The Los Alamos NalionalLaboraioryrequeststhat the publisheridentifythisarticleas workpedorrned und_ the auspicesoftheU.S. Departmentoi Energy.

Research paper thumbnail of A Large Hadron Electron Collider at CERNReport on the Physics and Design Concepts for Machine and Detector

Research paper thumbnail of Recent progress in neutrino factory and muon collider research within the Muon Collaboration

Physical Review Special Topics-accelerators and Beams, 2003

We describe the status of our effort to realize a first neutrino factory and the progress made in... more We describe the status of our effort to realize a first neutrino factory and the progress made in understanding the problems associated with the collection and cooling of muons towards that end.

Research paper thumbnail of Parametric study of a high current–density EBIS Charge Breeder regarding Two Stream plasma Instability (TSI)

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2016