100-ps gated x-ray spectrometer

Peter J. Walsh; Richard L. Blake; Stephen E. Caldwell; Mary Hockaday; R. Chrien; Randall C. Smith

doi:10.1117/12.218322

1 September 1995 100-ps gated x-ray spectrometer

Peter J. Walsh, Richard L. Blake, Stephen E. Caldwell, Mary Hockaday, R. Chrien, Randall C. Smith

Proceedings Volume 2549, Ultrahigh- and High-Speed Photography, Videography, and Photonics '95; (1995) https://doi.org/10.1117/12.218322
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Material opacities are of interest in many fields. We have developed a Bragg reflection spectrometer that is gated for imaging samples in a laser heated environment for opacity measurement. A micro-channel plate is coated with a photocathode material and a fast pulse is launched across it. Electrons are converted to photons in a phosphor and recorded on film. Optical gate pulse widths of 100 ps are achieved. Some optical pulse width and sensitivity enhancements are noted at launch and termination. Events of interest are 200 ps long. The framing window is approximately 250 ps in length. Timing jitter is a problem. The instrument timing networks have been examined, and the source of jitter is still unknown. Timing to 50 ps resolution is desired. Close in proximity to the laser-driven event leads to complications in shielding from hard x-rays, hot electrons and shock-driven damage. High Z materials provide shielding from hard x-rays. Magnets screen out hot electrons produced by laser-matter interactions. Filters provide energy fiducials. PCD's provide high resolution timing measurements. Data is recorded on film in a specially designed film pack. The instrument is designed to be used in the NOVA Laser Facility at Lawrence Livermore National Laboratory.

Citation Download Citation

Peter J. Walsh, Richard L. Blake, Stephen E. Caldwell, Mary Hockaday, R. Chrien, and Randall C. Smith "100-ps gated x-ray spectrometer", Proc. SPIE 2549, Ultrahigh- and High-Speed Photography, Videography, and Photonics '95, (1 September 1995); https://doi.org/10.1117/12.218322

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available