Abstract
We have conducted various tests of the properties of single superconductinggrains, of the type that has been suggested for use in detectors for dark matter and coherent neutrino scattering. These tests included study of the variation of the critical fields of a single grain when it is rotated relative to the applied field, observations concerning the existence of the intermediate state, and the effects of irradiation by alpha and gamma particles. The materials studied were Sn, Al and Zn at 4He and 3He temperatures. The variation of the critical (superheating) field under rotation suggests that the uncertainty of the phase boundary observed in the past for colloids of such grains in large measure already present in the different orientations of a single grain. The irradiation experiments indicate that for certain materials a simple "global heating" picture of the grain flip process applies in that the grain shows a well defined, sharp flip threshold in an applied field, one which furthermore is in accordance with the superconducting specific heat of the grain.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 583-594 |
| Number of pages | 12 |
| Journal | Nuclear Inst. and Methods in Physics Research, A |
| Volume | 287 |
| Issue number | 3 |
| DOIs | |
| State | Published - Feb 15 1990 |
| Externally published | Yes |
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ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Instrumentation
Cite this
Studies of single superconducting grains for a neutrino and dark matter detector. / Frank, Matthias; Freund, P.; Gebauer, J.; Pretzl, K.; Singsaas, A.; Stodolsky, L.
In: Nuclear Inst. and Methods in Physics Research, A, Vol. 287, No. 3, 15.02.1990, p. 583-594.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Studies of single superconducting grains for a neutrino and dark matter detector
AU - Frank, Matthias
AU - Freund, P.
AU - Gebauer, J.
AU - Pretzl, K.
AU - Singsaas, A.
AU - Stodolsky, L.
PY - 1990/2/15
Y1 - 1990/2/15
N2 - We have conducted various tests of the properties of single superconductinggrains, of the type that has been suggested for use in detectors for dark matter and coherent neutrino scattering. These tests included study of the variation of the critical fields of a single grain when it is rotated relative to the applied field, observations concerning the existence of the intermediate state, and the effects of irradiation by alpha and gamma particles. The materials studied were Sn, Al and Zn at 4He and 3He temperatures. The variation of the critical (superheating) field under rotation suggests that the uncertainty of the phase boundary observed in the past for colloids of such grains in large measure already present in the different orientations of a single grain. The irradiation experiments indicate that for certain materials a simple "global heating" picture of the grain flip process applies in that the grain shows a well defined, sharp flip threshold in an applied field, one which furthermore is in accordance with the superconducting specific heat of the grain.
AB - We have conducted various tests of the properties of single superconductinggrains, of the type that has been suggested for use in detectors for dark matter and coherent neutrino scattering. These tests included study of the variation of the critical fields of a single grain when it is rotated relative to the applied field, observations concerning the existence of the intermediate state, and the effects of irradiation by alpha and gamma particles. The materials studied were Sn, Al and Zn at 4He and 3He temperatures. The variation of the critical (superheating) field under rotation suggests that the uncertainty of the phase boundary observed in the past for colloids of such grains in large measure already present in the different orientations of a single grain. The irradiation experiments indicate that for certain materials a simple "global heating" picture of the grain flip process applies in that the grain shows a well defined, sharp flip threshold in an applied field, one which furthermore is in accordance with the superconducting specific heat of the grain.
UR - http://www.scopus.com/inward/record.url?scp=0000753421&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000753421&partnerID=8YFLogxK
U2 - 10.1016/0168-9002(90)91583-W
DO - 10.1016/0168-9002(90)91583-W
M3 - Article
AN - SCOPUS:0000753421
VL - 287
SP - 583
EP - 594
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
SN - 0168-9002
IS - 3
ER -