Clover: The CMB polarization observer
EAS PUBLICATIONS 14 (2005) 251-256
Abstract:
We present a new, fully-funded ground-based instrument designed to measure the B-mode polarization of the Cosmic Microwave Background (CMB). The concept is based on three independent subsystems operating at 90, 150 and 220 GHz, each comprising a telescope and a focal plane of horn-coupled background-limited bolometers. This highly-sensitive experiment, planned to be based at Dome C station in Antarctica, is optimised to produce very low systematic effects. It will allow the detection of the CMB polarization over angular multipoles 20 < l < 1000 accurately enough to measure the B-mode signature from gravitational waves to a lensing-confusion-limited tensor-to-scalar ratio r similar to 0.005.A 700-GHz SIS antipodal finline mixer fed by a Pickett-Potter horn-reflector antenna
IEEE Transactions on Microwave Theory and Techniques 52 (2004) 2352-2360
CLOVER - A new instrument for measuring the B-mode polarization of the CMB
ArXiv astro-ph/0407148 (2004)
Abstract:
We describe the design and expected performance of Clover, a new instrument designed to measure the B-mode polarization of the cosmic microwave background. The proposed instrument will comprise three independent telescopes operating at 90, 150 and 220 GHz and is planned to be sited at Dome C, Antarctica. Each telescope will feed a focal plane array of 128 background-limited detectors and will measure polarized signals over angular multipoles 20 < l < 1000. The unique design of the telescope and careful control of systematics should enable the B-mode signature of gravitational waves to be measured to a lensing-confusion-limited tensor-to-scalar ratio r~0.005.A TES finfine detector for bolometric interferometry
P SOC PHOTO-OPT INS 5498 (2004) 362-370
Abstract:
In this paper we present a novel design of an antenna coupled TES direct detector for high performance applications. In particular, the design of the detector has been optimised to be suitable for the measurement of the weak B-mode signal in the CMB polarization. An important feature of this design is that it employs corrugated horn antennas for coupling the astronomical signal to the detector. This allows us to feed the telescope with a well collimated beam with low sidelobes and cross polarization. The paper contains simulations demonstrating the suitability of individual electromagnetic components to be used in the instrument.Quantum multitone simulations of saturation in SIS mixers
P SOC PHOTO-OPT INS 5498 (2004) 158-167