(Cd,Mn)Te detectors for characterization of x-ray emissions generated during laser-driven fusion experiments Metadata

Title

• Main Title (Cd,Mn)Te detectors for characterization of x-ray emissions generated during laser-driven fusion experiments

Creator

• Author: Cross, A. S.
  Creator Type: Personal
• Author: Knauer, J. P.
  Creator Type: Personal
• Author: Mycielski, A.
  Creator Type: Personal
• Author: Kochanowska, D.
  Creator Type: Personal
• Author: Wiktowska-Baran, M.
  Creator Type: Personal
• Author: Jakiela, R.
  Creator Type: Personal
• Author: Domagala, J.
  Creator Type: Personal
• Author: Cui, Y.
  Creator Type: Personal
• Author: James, R.
  Creator Type: Personal
• Author: Sobolewski, R.
  Creator Type: Personal

Contributor

• Sponsor: United States. National Nuclear Security Administration.
  Contributor Type: Organization
  Contributor Info: DOE - National Nuclear Security Administration

Publisher

• Name: Brookhaven National Laboratory
  Place of Publication: United States

Date

• Creation: 2008-10-19

Language

• English

Description

• Content Description: We present our measurements of (Cd,Mn)Te photoconductive detectors (PCDs), fabricated for the goal of measuring both the temporal and spectral dependences of X-ray emissions generated from laser-illuminated targets during the inertial confinement fusion experiments. Our Cd{sub 1-x}Mn{sub x}Te (x = 0.05) single crystals, doped with V, were grown using a vertical Bridgman method and, subsequently, annealed in Cd for the highest resistivity ({approx}10{sup 10} {Omega}cm) and a good mobility-lifetime product ({approx}10{sup -3} cm{sup 2}/V). The 1-mm- and 2.3-mm-thick detectors were placed in the same housing as two 1-mm-thick diamond PCDs. All devices were pre-screened by a 7.6-mm-thick Be X-ray filter with a frequency cutoff of 1 keV. The incident shots from the OMEGA laser were 1-ns-long square pulses with energies ranging from 2.3 kJ to 22.6 kJ, and the PCDs were biased with 5000 V/cm. The response amplitudes and rise times of our (Cd,Mn)Te PCDs were comparable with the diamond detector performance, while the decay times were 4 to 10 times longer and in the 2-5 ns range. We observed two X-ray emission events separated by 1.24 ns. The first was identified as caused by heating of the target and creating a hot corona, while the second one was from the resulting compressed core. For comparison purposes, our testing was performed using {approx}1 keV X-ray photons, optimal for the diamond PCD. According to the presented simulations, however, at X-ray energies >10 keV diamond absorption efficiency drops to <50%, whereas for (Cd,Mn)Te the drop occurs at {approx}100 keV with near perfect, 100% absorption, up to 50 keV.

Subject

• Keyword: Heating
• Keyword: Decay
• Keyword: Amplitudes
• Keyword: Pulse Rise Time
• STI Subject Categories: 70 Plasma Physics And Fusion Technology
• Keyword: Lasers
• Keyword: Bridgman Method
• Keyword: Efficiency
• Keyword: Absorption
• Keyword: Targets
• Keyword: Diamonds
• STI Subject Categories: 72 Physics Of Elementary Particles And Fields
• Keyword: Inertial Confinement
• Keyword: Testing
• Keyword: Monocrystals
• Keyword: Performance
• Keyword: Photons

Source

• Conference: IEEE Dresden 2008; Dresden, Germany; 20081019 through 20081025

Collection

• Name: Office of Scientific & Technical Information Technical Reports
  Code: OSTI

Institution

• Name: UNT Libraries Government Documents Department
  Code: UNTGD

Resource Type

• Article

Format

• Text

Identifier

• Report No.: BNL--82064-2009-CP
• Grant Number: DE-AC02-98CH10886
• Office of Scientific & Technical Information Report Number: 950010
• Archival Resource Key: ark:/67531/metadc929055