Large area bismuth absorbers for X-ray microcalorimeters

J. E. Vaillancourt, C. A. Allen, R. Brekosky, A. Dosaj, Massimiliano Galeazzi, R. Kelley, D. Liu, D. McCammon, F. S. Porter, L. E. Rocks, W. T. Sanders, C. K. Stahle

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Two challenges facing the use of large area (2 mm × 2 mm) bismuth absorbers for microcalorimetry are uncertainties in the heat capacity of bismuth and the effects of lateral heat conduction and position dependence due to the absorber's large size. We have measured the heat capacity of three Bi samples to be 0.3-0.6 J K-1 m-3 at 100 mK. These absorbers also exhibit response variations as phonons created by an X-ray event at an absorber edge will take longer to propagate to the thermometer attachment point than those at the absorber center. This effect may degrade the detector's energy resolution if the propagation time is not very short compared to the thermometer time constant. We show that the response of the largest absorber varies by ∼4% across its area.

Original languageEnglish (US)
Pages (from-to)212-215
Number of pages4
JournalNuclear Inst. and Methods in Physics Research, A
Volume520
Issue number1-3
DOIs
StatePublished - Mar 11 2004

Fingerprint

Thermometers
Bismuth
bismuth
Specific heat
calorimeters
absorbers
X rays
Phonons
Heat conduction
x rays
thermometers
Detectors
specific heat
conductive heat transfer
time constant
attachment
phonons
propagation
detectors
Uncertainty

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

Cite this

Vaillancourt, J. E., Allen, C. A., Brekosky, R., Dosaj, A., Galeazzi, M., Kelley, R., ... Stahle, C. K. (2004). Large area bismuth absorbers for X-ray microcalorimeters. Nuclear Inst. and Methods in Physics Research, A, 520(1-3), 212-215. https://doi.org/10.1016/j.nima.2003.11.231

Large area bismuth absorbers for X-ray microcalorimeters. / Vaillancourt, J. E.; Allen, C. A.; Brekosky, R.; Dosaj, A.; Galeazzi, Massimiliano; Kelley, R.; Liu, D.; McCammon, D.; Porter, F. S.; Rocks, L. E.; Sanders, W. T.; Stahle, C. K.

In: Nuclear Inst. and Methods in Physics Research, A, Vol. 520, No. 1-3, 11.03.2004, p. 212-215.

Research output: Contribution to journalArticle

Vaillancourt, JE, Allen, CA, Brekosky, R, Dosaj, A, Galeazzi, M, Kelley, R, Liu, D, McCammon, D, Porter, FS, Rocks, LE, Sanders, WT & Stahle, CK 2004, 'Large area bismuth absorbers for X-ray microcalorimeters', Nuclear Inst. and Methods in Physics Research, A, vol. 520, no. 1-3, pp. 212-215. https://doi.org/10.1016/j.nima.2003.11.231
Vaillancourt, J. E. ; Allen, C. A. ; Brekosky, R. ; Dosaj, A. ; Galeazzi, Massimiliano ; Kelley, R. ; Liu, D. ; McCammon, D. ; Porter, F. S. ; Rocks, L. E. ; Sanders, W. T. ; Stahle, C. K. / Large area bismuth absorbers for X-ray microcalorimeters. In: Nuclear Inst. and Methods in Physics Research, A. 2004 ; Vol. 520, No. 1-3. pp. 212-215.
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