T. Nash et al., Spatially and temporally resolved crystal spectrometer for diagnosing high-temperature pinch plasmas on Z, REV SCI INS, 70(1), 1999, pp. 302-304
We have developed a spatially and temporally resolved crystal spectrometer
for analyzing a variety of pinch experiments on Z. The spectrometer uses a
convex curved crystal to disperse spectra onto a flat microchannel plate (M
CP) framing camera detector. A single wide, 1 cm, strip on the MCP is gated
to provide temporal resolution. The spectral range governed by the 4 cm le
ngth of the MCP strip varies with the central Bragg angle and crystal. For
a KAP crystal a typical range is 1500-2000 eV. This range can be shifted by
translating the crystal along the optical axis to access different Bragg a
ngles. The spectrometer can therefore measure K shell spectra of a wide var
iety of elements such as Al, Ti, and Fe. The short 1 cm width of the strip
is spatially resolved with an imaging cross slit. With a 500 mu m cross sli
t and magnification 1 the spatial resolution at the pinch is 1 mm. The inst
rument may also be fielded with seven time frames using a seven strip-line
microchannel plate as the detector by sacrificing the spatial resolution. W
e will present data obtained from an aluminum pinch on Z. (C) 1999 American
Institute of Physics. [S0034-6748(99)54101-4].