Freeman C G, Fiksel G, Stoeckl C, Sinenian N, Canfield M J, Graeper G B, Lombardo A T, Stillman C R, Padalino S J, Mileham C, Sangster T C, Frenje J A
Physics Department, SUNY Geneseo, Geneseo, New York 14454, USA.
Rev Sci Instrum. 2011 Jul;82(7):073301. doi: 10.1063/1.3606446.
A Thomson parabola ion spectrometer has been designed for use at the Multiterawatt (MTW) laser facility at the Laboratory for Laser Energetics (LLE) at the University of Rochester. This device uses parallel electric and magnetic fields to deflect particles of a given mass-to-charge ratio onto parabolic curves on the detector plane. Once calibrated, the position of the ions on the detector plane can be used to determine the particle energy. The position dispersion of both the electric and magnetic fields of the Thomson parabola was measured using monoenergetic proton and alpha particle beams from the SUNY Geneseo 1.7 MV tandem Pelletron accelerator. The sensitivity of Fujifilm BAS-TR imaging plates, used as a detector in the Thomson parabola, was also measured as a function of the incident particle energy over the range from 0.6 MeV to 3.4 MeV for protons and deuterons and from 0.9 MeV to 5.4 MeV for alpha particles. The device was used to measure the energy spectrum of laser-produced protons at MTW.
已设计出一种汤姆逊抛物线离子谱仪，用于罗切斯特大学激光能量学实验室（LLE）的多太瓦（MTW）激光设施。该装置利用平行电场和磁场将给定质荷比的粒子偏转到探测器平面上的抛物线上。一旦校准，探测器平面上离子的位置可用于确定粒子能量。使用纽约州立大学杰纳苏1.7 MV串列佩利加速器产生的单能质子和α粒子束测量了汤姆逊抛物线电场和磁场的位置色散。还测量了用作汤姆逊抛物线探测器的富士胶片BAS-TR成像板的灵敏度，该灵敏度是入射粒子能量的函数，质子和氘核的能量范围为0.6 MeV至3.4 MeV，α粒子的能量范围为0.9 MeV至5.4 MeV。该装置用于测量MTW激光产生的质子的能谱。
