Looper M D, Blake J B, Cummings J R, Mewaldt R A
The Aerospace Corporation, Los Angeles, CA 90009, USA.
Radiat Meas. 1996 Nov;26(6):967-78. doi: 10.1016/s1350-4487(96)00098-4.
We report observations of geomagnetically-trapped hydrogen isotopes at low altitudes, near the feet of field lines in the inner zone, made with the PET instrument aboard the SAMPEX satellite. We have mapped protons from 19 to 500 MeV, and have discovered a collocated belt of deuterons, which we have mapped from 18 to 58 MeV/nucleon. We found deuterium at about 1% of the level of the proton flux at the same energy per nucleon, and no tritium at energies of tens of MeV/nucleon with an upper limit of about 0.1% of the proton flux. Protons and deuterons showed similar time dependence, with fluxes approximately tripling from July 1992 to March 1996, and similar pitch-angle dependence. The high-L limits of the proton and deuteron belts as functions of energy were organized by rigidity, as was to be expected if these limits were set for both species by inability of particles to sustain adiabatic motion and stable trapping.
我们报告了利用“太阳风与磁层探索者”（SAMPEX）卫星上的正电子望远镜（PET）仪器，在低海拔、内区磁力线底部附近对地磁捕获的氢同位素进行的观测结果。我们绘制了能量范围从19 MeV到500 MeV的质子分布图，并发现了一条与之并存的氘核带，我们绘制了其能量范围从18 MeV/核子到58 MeV/核子的分布图。我们发现，在相同的每核子能量下，氘的含量约为质子通量水平的1%，在几十MeV/核子的能量下未发现氚，其上限约为质子通量的0.1%。质子和氘核表现出相似的时间依赖性，通量从1992年7月到1996年3月大约增加了两倍，并且具有相似的俯仰角依赖性。质子和氘核带的高L值极限作为能量的函数是由刚度决定的，如果这些极限是由粒子无法维持绝热运动和稳定捕获而设定的，那么这是可以预期的。
