Status of BICEP Array and Integration of the 220/270 GHz Receiver

@misc{steiger2026status,
  title = {{Status of BICEP Array and Integration of the 220/270 GHz Receiver}},
  author = {A. Steiger and P. A. R. Ade and Z. Ahmed and M. Amiri and D. Barkats and R. Basu Thakur and C. A. Bischoff and D. Beck and J. J. Bock and V. Buza and B. Cantrall and J. R. Cheshire IV and J. Connors and J. Cornelison and M. Crumrine and A. J. Cukierman and E. Denison and L. Duband and M. A. Echter and M. Eiben and B. D. Elwood and S. Fatigoni and J. P. Filippini and A. Fortes and M. Gao and C. Giannakopoulos and N. Goeckner-Wald and D. C. Goldfinger and S. Gratton and J. A. Grayson and A. Greathouse and P. K. Grimes and M. Halpern and S. Henderson and T. D. Hoang and J. Hubmayr and H. Hui and K. D. Irwin and M. Izquierdo Poza and J. H. Kang and K. S. Karkare and S. Kefeli and J. M. Kovac and C. Kuo and K. Lasko and K. Lau and M. Lautzenhiser and G. Liu and S. C. Mackey and N. Maher and K. G. Megerian and L. Minutolo and L. Moncelsi and Y. Nakato and H. T. Nguyen and R. O'Brient and S. N. Paine and A. Patel and M. A. Petroff and A. R. Polish},
  howpublished = {arXiv},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2608.25015},
  eprint = {2608.25015},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2608.25015},
  note = {CC BY 4.0},
}

TY  - UNPB
TI  - Status of BICEP Array and Integration of the 220/270 GHz Receiver
AU  - A. Steiger
AU  - P. A. R. Ade
AU  - Z. Ahmed
AU  - M. Amiri
AU  - D. Barkats
AU  - R. Basu Thakur
AU  - C. A. Bischoff
AU  - D. Beck
AU  - J. J. Bock
AU  - V. Buza
AU  - B. Cantrall
AU  - J. R. Cheshire IV
AU  - J. Connors
AU  - J. Cornelison
AU  - M. Crumrine
AU  - A. J. Cukierman
AU  - E. Denison
AU  - L. Duband
AU  - M. A. Echter
AU  - M. Eiben
AU  - B. D. Elwood
AU  - S. Fatigoni
AU  - J. P. Filippini
AU  - A. Fortes
AU  - M. Gao
AU  - C. Giannakopoulos
AU  - N. Goeckner-Wald
AU  - D. C. Goldfinger
AU  - S. Gratton
AU  - J. A. Grayson
AU  - A. Greathouse
AU  - P. K. Grimes
AU  - M. Halpern
AU  - S. Henderson
AU  - T. D. Hoang
AU  - J. Hubmayr
AU  - H. Hui
AU  - K. D. Irwin
AU  - M. Izquierdo Poza
AU  - J. H. Kang
AU  - K. S. Karkare
AU  - S. Kefeli
AU  - J. M. Kovac
AU  - C. Kuo
AU  - K. Lasko
AU  - K. Lau
AU  - M. Lautzenhiser
AU  - G. Liu
AU  - S. C. Mackey
AU  - N. Maher
AU  - K. G. Megerian
AU  - L. Minutolo
AU  - L. Moncelsi
AU  - Y. Nakato
AU  - H. T. Nguyen
AU  - R. O'Brient
AU  - S. N. Paine
AU  - A. Patel
AU  - M. A. Petroff
AU  - A. R. Polish
PY  - 2026
DA  - 2026/08/27
PB  - arXiv
DO  - 10.48550/arxiv.2608.25015
UR  - https://arxiv.org/abs/2608.25015
AB  - Measurements of the polarization of the cosmic microwave background are critical for modern cosmology as they constrain the physics of the early universe and cosmic inflation. BICEP Array is using a series of small-aperture polarimeters located at the South Pole to measure this signal with a projected uncertainty on the tensor-to-scalar ratio r of approximately 0.001 by 2034. The 30/40 GHz receiver and the 150 GHz receiver have been observing the cosmic microwave background for multiple years, and data from these receivers will be included in the next published BICEP analysis result which includes all data taken through 2024. The 220/270 GHz receiver is partially completed with seven out of twelve detector modules installed, and is planned to be filled with five additional modules prior to the 2027 observation season. Finishing this receiver is a top priority for BA as the science goals of the experiment require the dust foreground cleaning this receiver will enable. On-site characterization efforts for this receiver from the 2025-26 austral summer show satisfactory spectroscopy, beam pointing, and 220 GHz efficiency, while the 270 GHz efficiency is an active area of work.
ER  -