CCAT: Mod-Cam Cryogenic Performance and its Impact on 280 GHz KID Array Noise
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866912615170572288 |
|---|---|
| author | Lin, Lawrence T. Vavagiakis, Eve M. Austermann, Jason E. Burgoyne, James R. Chapman, Scott Choi, Steve K. Crites, Abigail T. Duell, Cody J. Freundt, Rodrigo G. Gazda, Eliza Groppi, Christopher Huber, Anthony I. Huber, Zachary B. Hubmayr, Johannes Keller, Ben Mauskopf, Philip Middleton, Alicia Niemack, Michael D. Patel, Darshan A. Roberson, Cody Sinclair, Adrian K. Smith, Ema Vaskuri, Anna Vaughan, Benjamin J. Walker, Samantha Wang, Yi Wang, Yuhan Wheeler, Jordan Ruixuan Xie |
| author_facet | Lin, Lawrence T. Vavagiakis, Eve M. Austermann, Jason E. Burgoyne, James R. Chapman, Scott Choi, Steve K. Crites, Abigail T. Duell, Cody J. Freundt, Rodrigo G. Gazda, Eliza Groppi, Christopher Huber, Anthony I. Huber, Zachary B. Hubmayr, Johannes Keller, Ben Mauskopf, Philip Middleton, Alicia Niemack, Michael D. Patel, Darshan A. Roberson, Cody Sinclair, Adrian K. Smith, Ema Vaskuri, Anna Vaughan, Benjamin J. Walker, Samantha Wang, Yi Wang, Yuhan Wheeler, Jordan Ruixuan Xie |
| contents | The CCAT Observatory's Fred Young Submillimeter Telescope (FYST) is designed to observe submillimeter astronomical signals with high precision, using receivers fielding state-of-the-art kinetic inductance detector (KID) arrays. Mod-Cam, a first-light instrument for FYST, serves as a testbed for instrument module characterization, including detailed evaluation of thermal behavior under operating conditions prior to deploying modules in the larger Prime-Cam instrument. Prime-Cam is a first generation multi-band, wide-field camera for FYST, designed to field up to seven instrument modules and provide unprecedented sensitivity across a broad frequency range.
We present results from two key laboratory characterizations: an "optically open" cooldown to validate the overall thermal performance of the cryostat, and a "cold load" cooldown to measure the effect of focal plane temperature stability on detector noise. During the optically open test, we achieved stable base temperatures of 1.5 K on the 1 K stage and 85 mK at the detector stage. In the cold load configuration, we measured a detector focal plane RMS temperature stability of 3.2e-5 K. From this stability measurement, we demonstrate that the equivalent power from focal plane thermal fluctuations is only 0.0040% of a 5pW incident photon power for aluminum detectors and 0.0023% for titanium-nitride detectors, a negligible level for CCAT science goals. This highlights the success of the cryogenic system design and thermal management. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_25018 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | CCAT: Mod-Cam Cryogenic Performance and its Impact on 280 GHz KID Array Noise Lin, Lawrence T. Vavagiakis, Eve M. Austermann, Jason E. Burgoyne, James R. Chapman, Scott Choi, Steve K. Crites, Abigail T. Duell, Cody J. Freundt, Rodrigo G. Gazda, Eliza Groppi, Christopher Huber, Anthony I. Huber, Zachary B. Hubmayr, Johannes Keller, Ben Mauskopf, Philip Middleton, Alicia Niemack, Michael D. Patel, Darshan A. Roberson, Cody Sinclair, Adrian K. Smith, Ema Vaskuri, Anna Vaughan, Benjamin J. Walker, Samantha Wang, Yi Wang, Yuhan Wheeler, Jordan Ruixuan Xie Instrumentation and Methods for Astrophysics The CCAT Observatory's Fred Young Submillimeter Telescope (FYST) is designed to observe submillimeter astronomical signals with high precision, using receivers fielding state-of-the-art kinetic inductance detector (KID) arrays. Mod-Cam, a first-light instrument for FYST, serves as a testbed for instrument module characterization, including detailed evaluation of thermal behavior under operating conditions prior to deploying modules in the larger Prime-Cam instrument. Prime-Cam is a first generation multi-band, wide-field camera for FYST, designed to field up to seven instrument modules and provide unprecedented sensitivity across a broad frequency range. We present results from two key laboratory characterizations: an "optically open" cooldown to validate the overall thermal performance of the cryostat, and a "cold load" cooldown to measure the effect of focal plane temperature stability on detector noise. During the optically open test, we achieved stable base temperatures of 1.5 K on the 1 K stage and 85 mK at the detector stage. In the cold load configuration, we measured a detector focal plane RMS temperature stability of 3.2e-5 K. From this stability measurement, we demonstrate that the equivalent power from focal plane thermal fluctuations is only 0.0040% of a 5pW incident photon power for aluminum detectors and 0.0023% for titanium-nitride detectors, a negligible level for CCAT science goals. This highlights the success of the cryogenic system design and thermal management. |
| title | CCAT: Mod-Cam Cryogenic Performance and its Impact on 280 GHz KID Array Noise |
| topic | Instrumentation and Methods for Astrophysics |
| url | https://arxiv.org/abs/2509.25018 |