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Title: Measurement of transmission efficiency for 400 MeV proton beam through collimator at Fermilab MuCool Test Area using Chromox-6 scintillation screen

Abstract

The MuCool Test Area (MTA) at Fermilab is a facility to develop the technology required for ionization cooling for a future Muon Collider and/or Neutrino Factory. As part of this research program, feasibility studies of various types of RF cavities in a high magnetic field environment are in progress. As a unique approach, we have tested a RF cavity filled with a high pressure hydrogen gas with a 400 MeV proton beam in an external magnetic field (B = 3 T). Quantitative information about the number of protons passing through this cavity is an essential requirement of the beam test. The MTA is a flammable gas (hydrogen) hazard zone. Due to safety reasons, no active (energized) beam diagnostic instrument can be used. Moreover, when the magnetic field is on, current transformers (toroids) used for beam intensity measurements do not work due to the saturation of the ferrite material of the transformer. Based on these requirements, we have developed a passive beam diagnostic instrumentation using a combination of a Chromox-6 scintillation screen and CCD camera. This paper describes details of the beam profile and position obtained from the CCD image with B = 0 T and B = 3 T, andmore » for high and low intensity proton beams. A comparison is made with beam size obtained from multi-wires detector. Beam transmission efficiency through a collimator with a 4 mm diameter hole is measured by the toroids and CCD image of the scintillation screen. Results show that the transmission efficiency estimated from the CCD image is consistent with the toroid measurement, which enables us to monitor the beam transmission efficiency even in a high magnetic field environment.« less

Authors:
; ; ; ; ; ; ;  [1]; ; ;  [2]
  1. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
  2. Illinois Institute of Technology, Chicago, Illinois 60616 (United States)
Publication Date:
OSTI Identifier:
22118642
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 84; Journal Issue: 6; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CAVITIES; COLLIMATORS; COMPARATIVE EVALUATIONS; EFFICIENCY; FEASIBILITY STUDIES; FERMILAB; FERRITE; FERRITES; HAZARDS; HYDROGEN; IMAGES; MAGNETIC FIELDS; MONITORS; PRESSURE RANGE MEGA PA 10-100; PROTON BEAMS; PROTONS; RESEARCH PROGRAMS; SCINTILLATIONS; TRANSFORMERS; TRANSMISSION

Citation Formats

Jana, M. R., Chung, M., Leonova, M., Moretti, A., Palmer, M., Schwarz, T., Tollestrup, A., Yonehara, K., Freemire, B., Hanlet, P., and Torun, Y. Measurement of transmission efficiency for 400 MeV proton beam through collimator at Fermilab MuCool Test Area using Chromox-6 scintillation screen. United States: N. p., 2013. Web. doi:10.1063/1.4808275.
Jana, M. R., Chung, M., Leonova, M., Moretti, A., Palmer, M., Schwarz, T., Tollestrup, A., Yonehara, K., Freemire, B., Hanlet, P., & Torun, Y. Measurement of transmission efficiency for 400 MeV proton beam through collimator at Fermilab MuCool Test Area using Chromox-6 scintillation screen. United States. https://doi.org/10.1063/1.4808275
Jana, M. R., Chung, M., Leonova, M., Moretti, A., Palmer, M., Schwarz, T., Tollestrup, A., Yonehara, K., Freemire, B., Hanlet, P., and Torun, Y. 2013. "Measurement of transmission efficiency for 400 MeV proton beam through collimator at Fermilab MuCool Test Area using Chromox-6 scintillation screen". United States. https://doi.org/10.1063/1.4808275.
@article{osti_22118642,
title = {Measurement of transmission efficiency for 400 MeV proton beam through collimator at Fermilab MuCool Test Area using Chromox-6 scintillation screen},
author = {Jana, M. R. and Chung, M. and Leonova, M. and Moretti, A. and Palmer, M. and Schwarz, T. and Tollestrup, A. and Yonehara, K. and Freemire, B. and Hanlet, P. and Torun, Y.},
abstractNote = {The MuCool Test Area (MTA) at Fermilab is a facility to develop the technology required for ionization cooling for a future Muon Collider and/or Neutrino Factory. As part of this research program, feasibility studies of various types of RF cavities in a high magnetic field environment are in progress. As a unique approach, we have tested a RF cavity filled with a high pressure hydrogen gas with a 400 MeV proton beam in an external magnetic field (B = 3 T). Quantitative information about the number of protons passing through this cavity is an essential requirement of the beam test. The MTA is a flammable gas (hydrogen) hazard zone. Due to safety reasons, no active (energized) beam diagnostic instrument can be used. Moreover, when the magnetic field is on, current transformers (toroids) used for beam intensity measurements do not work due to the saturation of the ferrite material of the transformer. Based on these requirements, we have developed a passive beam diagnostic instrumentation using a combination of a Chromox-6 scintillation screen and CCD camera. This paper describes details of the beam profile and position obtained from the CCD image with B = 0 T and B = 3 T, and for high and low intensity proton beams. A comparison is made with beam size obtained from multi-wires detector. Beam transmission efficiency through a collimator with a 4 mm diameter hole is measured by the toroids and CCD image of the scintillation screen. Results show that the transmission efficiency estimated from the CCD image is consistent with the toroid measurement, which enables us to monitor the beam transmission efficiency even in a high magnetic field environment.},
doi = {10.1063/1.4808275},
url = {https://www.osti.gov/biblio/22118642}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 6,
volume = 84,
place = {United States},
year = {Sat Jun 15 00:00:00 EDT 2013},
month = {Sat Jun 15 00:00:00 EDT 2013}
}