Beam Properties of the new Radiation Effects Research Stations at Indiana University Cyclotron Facility
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Beam Properties of the new Radiation Effects Research Stations at Indiana University Cyclotron Facility B. von Przewoski1, T. Rinckel1, W. Manwaring1, T. Ellis1, C.C. Foster2 , E.R. Hall1, T. Kinser1, K.M. Murray3 1 Indiana University Cyclotron Facility, Bloomington, IN 47405, U.S.A. 2 Foster Consulting Services, LLC, Tacoma, WA 98466, U.S.A. 3 KM Sciences, Basking Ridge, NJ 07920, U.S.A. ABSTRACT We describe two new beamlines for radiation effects research at the Indiana University Cyclotron Facility. Protons with energies up to 205 MeV are available. One of the beamlines offers momentum selected beams at energies as low as 52 MeV.
INTRODUCTION High energy protons are useful for ground based simulation of the effects of space radiation on electronic components, devices and systems as well as passive materials. Protons are the most prolific ion species in space. The proton beam also allows the simulation of radiation environments as they exist near colliding beams used in particle physics research. Finally, the proton beam is a useful tool for detector development and calibration. The Indiana University Cyclotron Facility (IUCF) is located in Bloomington, Indiana, and provides proton beams of up to 205 MeV for a variety of applications. IUCF has had an active proton-based radiation effects research program since 1994. Two new, state-of-the art radiation effects research stations (RERS1 and RERS2) and a dedicated counting room have been installed and fully instrumented. The first beamline became operational in July 2003 while the second beamline was ready for beam delivery in December of 2003. The two new beamlines (RERS1/2) were sponsored by the NASA Johnson Space Center. The Radiation Effects Research Program offers flexible scheduling, user-friendly facilities and state-of-the art dosimetry. Access to the proton beam is commercially available to industry, government, military and academic users 365 days a year. The present paper will review those facilities, report on beam properties and proton dosimetry and briefly describe the future neutron radiation effects research facility.
RERS OVERVIEW Beam is extracted from the cyclotron at 205 MeV and delivered by a fast kicker system to each of the new irradiation stations. Available fluxes are between 102 and 1011 protons/second/cm2 (at 205 MeV). RERS2 offers momentum selected beams at energies as low as 52 MeV. For each irradiation, the fluence is automatically determined from the radiation time, the average proton current, measured with a calibrated secondary electron monitor, and the known beam profile. All of this is logged as is
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the incident exposure dose to the device calculated from the fluence and stopping power for protons in the material of the device at the incident proton energy. Both beamlines feature exposure times as short as a few seconds and as long as 12 hours, and beam spot sizes from 2 cm in diameter to 7 cm in diameter. Beam spot sizes as large as 30 cm diameter are available in RERS1. Table 1 summarizes the proton capabilit
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