A Magnetic Thermometer for High-Resolution 10 mK Scale Thermometry

Award Information
Agency:
National Aeronautics and Space Administration
Branch
n/a
Amount:
$99,999.00
Award Year:
2010
Program:
SBIR
Phase:
Phase I
Contract:
NNX10CD64P
Agency Tracking Number:
095130
Solicitation Year:
n/a
Solicitation Topic Code:
S1
Solicitation Number:
n/a
Small Business Information
STAR Cryoelectronics, LLC
25-A Bisbee Court, Santa Fe, NM, 87508
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
071331768
Principal Investigator:
Robin Cantor
Principal Investigator
(505) 424-6454
rcantor@starcryo.com
Business Contact:
Robin Cantor
Business Official
(505) 424-6454
rcantor@starcryo.com
Research Institution:
n/a
Abstract
An innovative thin-film magnetic thermometer with integrated superconducting quantum interference device (SQUID) readout is described for fast, precision temperature measurements in the 10 mK range. The compact thermometer consists of a miniature DC SQUID susceptometer with a dilute paramagnetic alloy deposited in one of the two series-configured gradiometric SQUID pickup loops that form the SQUID inductance. Directly sensing the magnetic signal with the SQUID eliminates losses that would otherwise occur by transformer-coupling the signal to a remotely located SQUID, usually operating at a higher temperature and consequently with a higher noise floor. In addition, a novel superconducting flux concentrator deposited on top of the paramagnetic alloy homogenizes and concentrates the magnetic flux density in the paramagnet and reduces the inductance of the pickup coil, both of which improve the sensitivity and signal to noise ratio as compared with previous miniature susceptometer designs. The innovative magnetic thermometer design is expected to achive a temperature resolution well below 1

* information listed above is at the time of submission.

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