High-resolution x-ray spectroscopy with the EBIT Calorimeter Spectrometer

Journal Article · Wed Dec 16 04:00:00 EST 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3292376· OSTI ID:21325812

Porter, F Scott; Adams, Joseph S; Kelley, Richard L; Kilbourne, Caroline A ^[1]; Beiersdorfer, Peter; Brown, Gregory V; Clementson, Joel; Frankel, Miriam ^[2]; Kahn, Steven M ^[3]

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1. NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)
2. Lawrence Livermore National Laboratory, Livermore, CA 94550 (United States)
3. Stanford University, Stanford, CA 94305 (United States)

The EBIT Calorimeter Spectrometer (ECS) is a production-class 36 pixel x-ray calorimeter spectrometer that has been continuously operating at the Electron Beam Ion Trap (EBIT) facility at Lawrence Livermore National Laboratory for almost 2 years. The ECS was designed to be a long-lifetime, turn-key spectrometer that couples high performance with ease of operation and minimal operator intervention. To this end, a variant of the Suzaku/XRS spaceflight detector system has been coupled to a low-maintenance cryogenic system consisting of a long-lifetime liquid He cryostat, and a closed cycle, {sup 3}He pre-cooled adiabatic demagnetization refrigerator. The ECS operates for almost 3 weeks between cryogenic servicing and the ADR operates at 0.05 K for more than 60 hours between automatic recycles under software control. Half of the ECS semiconductor detector array is populated with mid-band pixels that have a resolution of 4.5 eV FWHM, a bandpass from 0.05-12 keV, and a quantum efficiency of 95% at 6 keV. The other half of the array has thick HgTe absorbers that have a bandpass from 0.3 to over 100 keV, an energy resolution of 33 eV FWHM, and a quantum efficiency of 32% at 60 keV. In addition, the ECS uses a real-time, autonomous, data collection and analysis system developed for the Suzaku/XRS instrument and implemented in off-the-shelf hardware for the ECS. Here we will discuss the performance of the ECS instrument and its implementation as a turnkey cryogenic detector system.

• OSTI ID: 21325812
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1185; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ADIABATIC DEMAGNETIZATION
CALORIMETERS
CALORIMETRY
CONTROL
CRYOSTATS
ENERGY RESOLUTION
EV RANGE
HELIUM 3
KEV RANGE
LAWRENCE LIVERMORE NATIONAL LABORATORY
LIFETIME
MAINTENANCE
MERCURY TELLURIDES
PERFORMANCE
QUANTUM EFFICIENCY
SEMICONDUCTOR DETECTORS
X-RAY DETECTION
X-RAY SPECTROSCOPY