Mauskopf, Philip Daniel ![]() |
Abstract
We report the design and performance of 300-mK composite bolometers that use micromesh absorbers and support structures patterned from thin films of low-stress silicon nitride. The small geometrical filling factor of the micromesh absorber provides 20× reduction in heat capacity and cosmic ray cross section relative to a solid absorber with no loss in IR-absorption efficiency. The support structure is mechanically robust and has a thermal conductance, G < 2 × 10−11 W/K, which is four times smaller than previously achieved at 300 mK. The temperature rise of the bolometer is measured with a neutron transmutation doped germanium thermistor attached to the absorbing mesh. The dispersion in electrical and thermal parameters of a sample of 12 bolometers optimized for the Sunyaev–Zel’dovich Infrared Experiment is ±7% in R (T), ±5% in optical efficiency, and ±4% in G.
Item Type: | Article |
---|---|
Date Type: | Publication |
Status: | Published |
Schools: | Schools > Physics and Astronomy |
Subjects: | Q Science > QB Astronomy |
Publisher: | OSA |
ISSN: | 0003-6935 |
Last Modified: | 24 Oct 2022 11:26 |
URI: | https://orca.cardiff.ac.uk/id/eprint/48111 |
Citation Data
Cited 129 times in Scopus. View in Scopus. Powered By Scopus® Data
Actions (repository staff only)
![]() |
Edit Item |