McCarrick, H., Jones, G., Johnson, B.R., Abitbol, M.H., Ade, Peter  ORCID: https://orcid.org/0000-0002-5127-0401, Bryan, S., Day, P., Essinger-Hileman, T., Flanigan, D., Leduc, H.G., Limon, M., Mauskopf, Philip ORCID: https://orcid.org/0000-0001-6397-5516, Miller, A. and Tucker, Carole ORCID: https://orcid.org/0000-0002-1851-3918
2018.
Design and performance of dual-polarization lumped-element kinetic inductance detectors for millimeter-wave polarimetry.
Astronomy and Astrophysics
610
, A45.
10.1051/0004-6361/201732044
|
Preview |
PDF
- Published Version
Download (6MB) | Preview |
Abstract
Aims. Lumped-element kinetic inductance detectors (LEKIDs) are an attractive technology for millimeter-wave observations that require large arrays of extremely low-noise detectors. We designed, fabricated and characterized 64-element (128 LEKID) arrays of horn-coupled, dual-polarization LEKIDs optimized for ground-based CMB polarimetry. Our devices are sensitive to two orthogonal polarizations in a single spectral band centered on 150 GHz with ∆ν/ν = 0.2. The 65×65 mm square arrays are designed to be tiled into the focal plane of an optical system. We demonstrate the viability of these dual-polarization LEKIDs with laboratory measurements. Methods. The LEKID modules are tested with an FPGA-based readout system in a sub-kelvin cryostat that uses a two stage adiabatic demagnetization refrigerator. The devices are characterized using a blackbody and a millimeter-wave source. The polarization properties are measured with a cryogenic stepped half-wave plate. We measure the resonator parameters and the detector sensitivity, noise spectrum, dynamic range, and polarization response. Results. The resonators have internal quality factors approaching 1 × 106. The detectors have uniform response between orthogonal polarizations and a large dynamic range. The detectors are photon-noise limited above 1 pW of absorbed power. The noise-equivalent temperatures under a 3.4 K blackbody load are < 100 µK √ s. The polarization fractions of detectors sensitive to orthogonal polarizations are > 80%. The entire array is multiplexed on a single readout line, demonstrating a multiplexing factor of 128. The array and readout meet the requirements for 4 arrays to be read out simultaneously for a multiplexing factor of 512. Conclusions. This laboratory study demonstrates the first dual-polarization LEKID array optimized specifically for CMB polarimetry and shows the readiness of the detectors for on-sky observations.
| Item Type: | Article |
|---|---|
| Date Type: | Publication |
| Status: | Published |
| Schools: | Schools > Physics and Astronomy |
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
| Publisher: | EDP Sciences |
| ISSN: | 0004-6361 |
| Date of First Compliant Deposit: | 7 December 2017 |
| Date of Acceptance: | 17 November 2017 |
| Last Modified: | 05 May 2023 08:25 |
| URI: | https://orca.cardiff.ac.uk/id/eprint/107431 |
Citation Data
Cited 17 times in Scopus. View in Scopus. Powered By Scopus® Data
Actions (repository staff only)
 |
Edit Item |
Dimensions
Dimensions