Recovery of a chemical vapor deposited diamond detection system from strong pulses of laser produced x rays

Journal Article · Sun Oct 15 04:00:00 EDT 2006 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.2235475· OSTI ID:20861346

Dauffy, L S; Koch, J A; Izumi, N; Tommasini, R ^[1]

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1. Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551 (United States)

We are planning an experiment that will study the response of a chemical vapor deposited (CVD) diamond detector to a strong x-ray pulse followed by a second weaker pulse arriving 50-300 ns later, with a contrast in amplitude of about 1000. These tests will be performed at the LLNL Jupiter laser facility and are intended to produce charge carrier densities similar to those expected during a DT implosion at the National Ignition Facility, where a large 14.1 MeV neutron pulse is followed by a weak downscattered neutron signal produced by slower 6-10 MeV neutrons. The areal density {rho}R is proportional to the number of downscattered neutrons. The challenge of measuring {rho}R resides consequently in the effects of the first strong pulse on the weaker later pulse, which may include the saturation of the diamond wafer, saturation of the oscilloscope, or saturation of the associated power and data acquisition electronics. We are presenting the preparation of a double pulse experiment that will use a system of three polycrystalline CVD diamond detectors irradiated by 8.6 keV x rays produced by two laser beams incident on a zinc target.

• OSTI ID: 20861346
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 10 Vol. 77; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
AMPLITUDES
CHARGE CARRIERS
CHEMICAL VAPOR DEPOSITION
DATA ACQUISITION
DENSITY
DETECTION
DIAMONDS
LASERS
MEV RANGE 10-100
NEUTRONS
POLYCRYSTALS
PULSES
SATURATION
X RADIATION