AXIS: an instrument for imaging Compton radiographs using the Advanced Radiography Capability on the NIF.
AXIS: an instrument for imaging Compton radiographs using the Advanced Radiography Capability on the NIF.
复制标题
AXIS：使用 NIF 上的高级放射成像功能对康普顿放射线照片进行成像的仪器。
DOI：
--
复制
发表时间：
2014
影响因子：
1.6
通讯作者：
O. Landen
中科院分区：
文献类型：
--
作者：
G. Hall;N. Izumi;R. Tommasini;A. Carpenter;N. Palmer;R. Zacharias;B. Felker;J. Holder;F. Allen;P. Bell;D. Bradley;R. Montesanti;O. Landen
康普顿射线摄影是一种重要的诊断惯性约束聚变（ICF），因为它提供了一种方法来测量密度和不对称的DT燃料在ICF胶囊接近峰值压缩时间。AXIS仪器（ARC（高级放射成像能力）x射线成像系统）是为国家点火设施（NIF）开发的门控探测器，最初将能够在一次NIF射击中记录两张康普顿射线照片。开发AXIS的主要原因是需要在高x射线能量下显著提高探测量子效率（DQE）。AXIS将是由ARC激光器驱动的康普顿射线照相探测器，该激光器将用于生产50kv - 200kev范围内的轫致辐射x射线背光光源。预计AXIS将能够用比NIF其他x射线相机大几倍的DQE记录这些高能x射线，并提供更大的内爆舱视野。因此，AXIS将提供具有更大信噪比的图像，这将使压缩DT燃料的密度和分布在ICF实验中进行点火调整时能够以更高的精度进行测量。
Compton radiography is an important diagnostic for Inertial Confinement Fusion (ICF), as it provides a means to measure the density and asymmetries of the DT fuel in an ICF capsule near the time of peak compression. The AXIS instrument (ARC (Advanced Radiography Capability) X-ray Imaging System) is a gated detector in development for the National Ignition Facility (NIF), and will initially be capable of recording two Compton radiographs during a single NIF shot. The principal reason for the development of AXIS is the requirement for significantly improved detection quantum efficiency (DQE) at high x-ray energies. AXIS will be the detector for Compton radiography driven by the ARC laser, which will be used to produce Bremsstrahlung X-ray backlighter sources over the range of 50 keV-200 keV for this purpose. It is expected that AXIS will be capable of recording these high-energy x-rays with a DQE several times greater than other X-ray cameras at NIF, as well as providing a much larger field of view of the imploded capsule. AXIS will therefore provide an image with larger signal-to-noise that will allow the density and distribution of the compressed DT fuel to be measured with significantly greater accuracy as ICF experiments are tuned for ignition.