国家点火装置（NIF）的静态X射线成像仪拍摄的激光入口孔图像。

Images of the laser entrance hole from the static x-ray imager at NIF.

作者信息

Schneider M B, Jones O S, Meezan N B, Milovich J L, Town R P, Alvarez S S, Beeler R G, Bradley D K, Celeste J R, Dixit S N, Edwards M J, Haugh M J, Kalantar D H, Kline J L, Kyrala G A, Landen O L, MacGowan B J, Michel P, Moody J D, Oberhelman S K, Piston K W, Pivovaroff M J, Suter L J, Teruya A T, Thomas C A, Vernon S P, Warrick A L, Widmann K, Wood R D, Young B K

机构信息

Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94551-0808, USA.

出版信息

Rev Sci Instrum. 2010 Oct;81(10):10E538. doi: 10.1063/1.3491316.

DOI:10.1063/1.3491316

PMID:21034065

Abstract

The static x-ray imager at the National Ignition Facility is a pinhole camera using a CCD detector to obtain images of Hohlraum wall x-ray drive illumination patterns seen through the laser entrance hole (LEH). Carefully chosen filters, combined with the CCD response, allow recording images in the x-ray range of 3-5 keV with 60 μm spatial resolution. The routines used to obtain the apparent size of the backlit LEH and the location and intensity of beam spots are discussed and compared to predictions. A new soft x-ray channel centered at 870 eV (near the x-ray peak of a 300 eV temperature ignition Hohlraum) is discussed.

摘要

国家点火装置的静态X射线成像仪是一种针孔相机，它使用电荷耦合器件（CCD）探测器来获取通过激光入射孔（LEH）看到的黑腔壁X射线驱动照明图案的图像。精心选择的滤光片与CCD响应相结合，能够以60微米的空间分辨率记录3至5千电子伏特X射线范围内的图像。文中讨论了用于获取背光LEH的表观尺寸以及束斑位置和强度的程序，并将其与预测结果进行了比较。还讨论了一个以870电子伏特为中心的新软X射线通道（接近300电子伏特温度点火黑腔的X射线峰值）。