Fabrication of Gamma Detectors Based on Magnetic Ag:Er Microcalorimeters
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Univ. of New Mexico, Albuquerque, NM (United States)
- STAR Cryoelectronics, Santa Fe, NM (United States)
This report discusses the photolithographic fabrication of ultra-high resolution gamma-ray detectors based on magnetic microcalorimeters (MMCs). The MMC uses a novel Er-doped silver sensor (Ag:Er) that is expected to have higher sensitivity than the Er-doped gold (Au:Er) sensors currently in use. The MMC also integrates the first-stage SQUID preamplifier on the same chip as the MMC gamma detector to increase its signal-to-noise ratio. In addition, the MMC uses a passive Ta-Nb heat switch to replace one of the common long-term failure points in earlier detectors. This report discusses the fabrication process we have developed to implement the proposed improvements.
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC52-07NA27344
- OSTI ID:
- 1259772
- Report Number(s):
- LLNL-TR-679717; TRN: US1601532
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
CALORIMETERS
DOPED MATERIALS
SQUID DEVICES
FABRICATION
GOLD
SILVER
ERBIUM
GAMMA DETECTION
SIGNAL-TO-NOISE RATIO
SENSORS
RESOLUTION
SENSITIVITY
ZEEMAN EFFECT
MAGNETIC FIELDS
TEMPERATURE RANGE 0000-0013 K
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
CALORIMETERS
DOPED MATERIALS
SQUID DEVICES
FABRICATION
GOLD
SILVER
ERBIUM
GAMMA DETECTION
SIGNAL-TO-NOISE RATIO
SENSORS
RESOLUTION
SENSITIVITY
ZEEMAN EFFECT
MAGNETIC FIELDS
TEMPERATURE RANGE 0000-0013 K