We describe the cryostat and supporting electronics for the EBEX experiment. EBEX is a balloon-borne polarimeter designed to measure the B-mode polarization of the cosmic microwave background radiation. The instrument includes a 1.5 meter Gregorian-type telescope and 1432 bolometric transition edge sensor detectors operating at 0.3 K. Electronics for monitoring temperatures and controlling cryostat refrigerators is read out over CANbus. A timing system ensures the data from all subsystems is accurately synchronized. EBEX completed an engineering test flight in June 2009 during which the cryogenics and supporting electronics performed according to predictions. The temperatures of the cryostat were stable, and an analysis of a subset of the data finds no scan synchronous signal in the cryostat temperatures. Preparations are underway for an Antarctic flight.
@article{arxiv.1005.3339,
title = {The EBEX Cryostat and Supporting Electronics},
author = {Ilan Sagiv and Asad M. Aboobaker and Chaoyun Bao and Shaul Hanany and Terry Jones and Jeffrey Klein and Michael Milligan and Daniel E. Polsgrove and Kate Raach and Kyle Zilic and Andrei Korotkov and Gregory S. Tucker and Yuri Vinukurov and Tomotake Matsumura and Peter Ade and Will Grainger and Enzo Pascale and Daniel Chapman and Joy Didier and Seth Hillbrand and Britt Reichborn-Kjennerud and Michele Limon and Amber Miller and Andrew Jaffe and Amit Yadav and Matias Zaldarriaga and Nicolas Ponthieu and Matthieu Tristram and Julian Borrill and Christopher Cantalupo and Ted Kisner and Francois Aubin and Matt Dobbs and Kevin MacDermid and Gene Hilton and Johhannes Hubmayr and Kent Irwin and Carl Reintsema and Carlo Baccigalupi and Sam Leach and Bradley Johnson and Adrian Lee and Huan Tran and Lorne Levinson},
journal= {arXiv preprint arXiv:1005.3339},
year = {2010}
}
Comments
11 pages, 6 figures, Proceedings of the 12th Marcel Grossman Conference