The Millimeter Bolometer Array Camera (MBAC) was commissioned in the fall of 2007 on the new 6-meter Atacama Cosmology Telescope (ACT). The MBAC on the ACT will map the temperature anisotropies of the Cosmic Microwave Background (CMB) with arc-minute resolution. For this ¯rst observing season, the MBAC contained a di®raction-limited, 32 by 32 element, focal plane array of Transition Edge Sensor (TES) bolometers for observations at 145 GHz. This array was coupled to the telescope with a series of cold, refractive, reimaging optics. To meet the performance speci¯cations, the MBAC employs four stages of cooling using closed-cycle 3He/4He sorption fridge systems in combination with pulse tube coolers. In this paper we present the design of the instrument and discuss its performance during the ¯rst observing season. Finally, we report on the status of the MBAC for the 2008 observing season, when the instrument will be upgraded to a total of three separate 1024-element arrays at 145 GHz, 220 GHz and 280 GHz.
Instrument design, characterization of the Millimeter Bolometer Array Camera on the Atacama Cosmology Telescope / D. S., Swetz; P. A. R., Ade; C., Allen; M., Amiri; J., Appel; Battistelli, Elia Stefano; B., Burger; J., Chervenak; A. J., Dahlen; S., Das; S., Denny; M. J., Devlin; S. R., Dicker; W. B., Doriese; R., Dunner; T., ESSINGER HILEMAN; R. P., Fisher; J. W., Fowler; X., Gao; A., Hajian; M., Halpern; P. C., Hargrave; M., Hasselfield; G. C., Hilton; A. D., Hincks; K. D., Irwin; N., Jarosik; M., Kaul; J., Klein; S., Knotek; J. M., Lau; M., Limon; R. H., Lupton; T. A., Marriage; K. L., Martocci; P., Mauskopf; S. H., Moseley; C. B., Netterfield; M. D., Niemack; M. R., Nolta; L., Page; L. P., Parker; B. A., Reid; C. D., Reintsema; A., Sederberg; N., Sehgal; J. L., Sievers; D. N., Spergel; S. T., Staggs; O. R., Stryzak; E. R., Switzer; R. J., Thornton; C., Tucker; E. J., Wollack; Y., Zhao. - 7020:(2008), pp. 702008-702008-12. (Intervento presentato al convegno SPIE tenutosi a FRANCIA) [10.1117/12.789876].
Instrument design, characterization of the Millimeter Bolometer Array Camera on the Atacama Cosmology Telescope
BATTISTELLI, Elia Stefano;
2008
Abstract
The Millimeter Bolometer Array Camera (MBAC) was commissioned in the fall of 2007 on the new 6-meter Atacama Cosmology Telescope (ACT). The MBAC on the ACT will map the temperature anisotropies of the Cosmic Microwave Background (CMB) with arc-minute resolution. For this ¯rst observing season, the MBAC contained a di®raction-limited, 32 by 32 element, focal plane array of Transition Edge Sensor (TES) bolometers for observations at 145 GHz. This array was coupled to the telescope with a series of cold, refractive, reimaging optics. To meet the performance speci¯cations, the MBAC employs four stages of cooling using closed-cycle 3He/4He sorption fridge systems in combination with pulse tube coolers. In this paper we present the design of the instrument and discuss its performance during the ¯rst observing season. Finally, we report on the status of the MBAC for the 2008 observing season, when the instrument will be upgraded to a total of three separate 1024-element arrays at 145 GHz, 220 GHz and 280 GHz.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.