Measurement of loss of DT fusion products using scintillator detectors in TFTR (invited)
Measurement of loss of DT fusion products using scintillator detectors in TFTR (invited)
复制标题
在 TFTR 中使用闪烁体探测器测量 DT 聚变产物的损失（特邀）
DOI：
10.1063/1.1146484
复制
发表时间：
1995
影响因子：
1.6
通讯作者：
M. Tuszewski
中科院分区：
文献类型：
--
作者：
D. Darrow;H. Herrmann;Dale W. Johnson;R. Marsala;R. Palladino;S. Zweben;M. Tuszewski
以前用于测量DD聚变产物损失的MeV离子损失探针的极向阵列已经升级，以测量TFTR中DT等离子体的α粒子损失。为准备在TFTR中使用氚，对系统作了以下改进：（1）将探测器移至地下室中子屏蔽室，以减少中子感生的背景信号：（2）用Y 3 Al 5 0 12 Ce（P46）替代探测器中的ZnS：Cu（P31）双折射器，以减少损伤并保证DT等离子体预期通量的线性;以及（3）屏蔽将光从探针传送到探测器的光纤束，以减少其中的中子和伽马感应光。除了上述准备工作外，还利用洛斯阿拉莫斯国家实验室的货车德格拉夫加速器对探测器进行了α粒子的绝对校准。已经观察到来自DT等离子体的α粒子损失，并且在中平面下方的检测器901处的损失与第一轨道损失一致。
A poloidal array of MeV ion loss probes previously used to measure DD fusion product loss has been upgraded to measure the loss of alpha particles from DT plasmas in TFTR. The following improvements to the system have been made in preparation for the use of tritium in TFTR: (1) relocation of detectors to a neutronshielded enclosure in the basement to reduce neutron-induced background signals; (2) replacement of ZnS:Cu (P31) scintillators in the probes with the Y{sub 3}Al{sub 5}0{sub 12}:Ce(P46) variety to minimize damage and assure linearity at the fluxes anticipated from DT plasmas; and (3) shielding of the fiber optic bundles which carry the fight from the probes to the detectors to reduce neutron- and gamma-induced light within them. In addition to the above preparations, the probes have been absolutely calibrated for alpha particles by using the Van de Graaf accelerator at Los Alamos National Laboratory. Alpha particle losses from DT plasmas have been observed, and losses at the detector 901 below the midplane are consistent with first orbit loss.