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

Journal Article · Sat Jun 15 00:00:00 EDT 2013 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.4808275· OSTI ID:22118642

Jana, M. R.; Chung, M.; Leonova, M.; Moretti, A.; Palmer, M.; Schwarz, T.; Tollestrup, A.; Yonehara, K. ^[1]; Freemire, B.; Hanlet, P.; Torun, Y. ^[2]

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1. Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States)
2. Illinois Institute of Technology, Chicago, Illinois 60616 (United States)

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.

• OSTI ID: 22118642
• Journal Information: Review of Scientific Instruments, Vol. 84, Issue 6; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

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