&lt;title&gt;Silicon nitride micromesh bolometer arrays for SPIRE&lt;/title&gt;

Bock, J. J.; Glenn, J.; Grannan, S. M.; Irwin, K. D.; Lange, A. E.; Leduc, H. G.; Turner, Anthony

doi:10.1117/12.317365

Cited by 39 publications

(20 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The center-to-center detector spacing of 5 mm was chosen to maximize the number of pixels in the Bolocam focal plane while retaining relatively efficient feedhorns. 12 The feedhorns have 1.2f c entrance apertures, where f is the focal ratio of the final optics ͑ f͞3 for Bolocam͒. The absorbers were 2.0 mm in diameter, with Si 3 N 4 support legs 0.5 mm long providing thermal isolation from the silicon wafer, which is heat stationed to the 300-mK bath.…”

Section: Description Of Numerical Simulationsmentioning

confidence: 99%

Numerical optimization of integrating cavities for diffraction-limited millimeter-wave bolometer arrays

Glenn¹,

Chattopadhyay²,

Edgington³

et al. 2002

Appl. Opt.

Self Cite

View full text Add to dashboard Cite

Far-infrared to millimeter-wave bolometers designed to make astronomical observations are typically encased in integrating cavities at the termination of feedhorns or Winston cones. This photometer combination maximizes absorption of radiation, enables the absorber area to be minimized, and controls the directivity of absorption, thereby reducing susceptibility to stray light. In the next decade, arrays of hundreds of silicon nitride micromesh bolometers with planar architectures will be used in ground-based, suborbital, and orbital platforms for astronomy. The optimization of integrating cavity designs is required for achieving the highest possible sensitivity for these arrays. We report numerical simulations of the electromagnetic fields in integrating cavities with an infinite plane-parallel geometry formed by a solid reflecting backshort and the back surface of a feedhorn array block. Performance of this architecture for the bolometer array camera ͑Bolocam͒ for cosmology at a frequency of 214 GHz is investigated. We explore the sensitivity of absorption efficiency to absorber impedance and backshort location and the magnitude of leakage from cavities. The simulations are compared with experimental data from a room-temperature scale model and with the performance of Bolocam at a temperature of 300 mK. The main results of the simulations for Bolocam-type cavities are that ͑1͒ monochromatic absorptions as high as 95% are achievable with Ͻ1% cross talk between neighboring cavities, ͑2͒ the optimum absorber impedances are 400 ⍀͞sq, but with a broad maximum from ϳ150 to ϳ700 ⍀͞sq, and ͑3͒ maximum absorption is achieved with absorber diameters Ն1.5. Good general agreement between the simulations and the experiments was found.

show abstract

Section: Description Of Numerical Simulationsmentioning

confidence: 99%

Numerical optimization of integrating cavities for diffraction-limited millimeter-wave bolometer arrays

Glenn¹,

Chattopadhyay²,

Edgington³

et al. 2002

Appl. Opt.

Self Cite

View full text Add to dashboard Cite

show abstract

“…For double-slot dipole antennas, the packing of the focal-plane has a set of trade-offs that are the same as the well-known trade-offs for horn antennas [11]. For horn antennas, a range of aperture sizes can be used.…”

Section: Antenna-coupled Arraysmentioning

confidence: 99%

Antenna-coupled arrays of voltage-biased superconducting bolometers

Myers

Lee

Richards

et al. 2002

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. We report on the development of antenna-coupled Voltage-biased Superconducting Bolometers (VSBs) which use Transition-edge Sensors (TES). Antenna coupling can greatly simplify the fabrication of large multi-frequency bolometer arrays compared to horn-coupled techniques. This simplification can make it practical to implement 1000+ element arrays that fill the focal plane of mm/sub-mm wave telescopes. We have designed a prototype device with a double-slot dipole antenna, integrated band-defining filters, and a membrane-suspended bolometer. A test chip has been constructed and will be tested shortly.

show abstract

“…The arrays are cooled to a temperature of 270 mK. Each array element is a silicon nitride micromesh ''spiderweb'' bolometer ( Bock et al 1996( Bock et al , 1998. The detector arrays, the feeds, and the mounting scheme are based on the SPIRE instrument design (Turner et al 2001).…”

Section: Receivermentioning

confidence: 99%

The Balloon-borne Large Aperture Submillimeter Telescope (BLAST)

Devlin

Aretxaga

Bock

et al. 2004

Millimeter and Submillimeter Detectors for Astronomy II

Self Cite

View full text Add to dashboard Cite

The Balloon-borne Large Aperture Submillimeter Telescope ( BLAST) is a suborbital surveying experiment designed to study the evolutionary history and processes of star formation in local galaxies (including the Milky Way) and galaxies at cosmological distances. The BLAST continuum camera, which consists of 270 detectors distributed between three arrays, observes simultaneously in broadband (30%) spectral windows at 250, 350, and 500 m. The optical design is based on a 2 m diameter telescope, providing a diffraction-limited resolution of 30 00 at 250 m. The gondola pointing system enables raster mapping of arbitrary geometry, with a repeatable positional accuracy of $30 00

show abstract

<title>Silicon nitride micromesh bolometer arrays for SPIRE</title>

Cited by 39 publications

References 4 publications

Numerical optimization of integrating cavities for diffraction-limited millimeter-wave bolometer arrays

Numerical optimization of integrating cavities for diffraction-limited millimeter-wave bolometer arrays

Antenna-coupled arrays of voltage-biased superconducting bolometers

The Balloon-borne Large Aperture Submillimeter Telescope (BLAST)

Contact Info

Product

Resources

About