New CsI(Na) hodoscope array for the S800 spectrograph at NSCL

作者：Meierbachtol K^*; Bazin D; Morrissey D J

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2011, 652(1): 668-670.

DOI：10.1016/j.nima.2010.10.053

• Hodoscope
• Spectrometer
• CsI(Na)

A scintillator based hodoscope array was recently constructed at the National Superconducting Cyclotron Laboratory (NSCL) at Michigan State University. The hodoscope will be used to measure the total kinetic energy of fragments in the focal plane of the large S800 magnetic spectrometer at the NSCL to provide atomic charge-state identification. The array consists of 32 closely packed 7.6 cm x 7.6 cm x 5.1 cm CsI(Na) crystals each coupled to a photomultiplier. All of the crystals were characterized with a gamma-ray source prior to installation in the focal plane of the spectrometer. The hodoscope was then tested with a mono-energetic (76)Ge primary beam as well as heavy ions from fragmentation reactions. The array is currently in place and has already been used in several recent experiments. The results of characterization of the properties of the crystals are presented here.

• 出版日期2011-10-1