TY - GEN
T1 - Readout system with on-board demodulation for CMB polarization experiments using coherent polarimeter array
AU - Ishidoshiro, Koji
AU - Nagai, Makoto
AU - Higuchi, Takeo
AU - Hasegawa, Masaya
AU - Hazumi, Masashi
AU - Ikeno, Masahiro
AU - Tajima, Osamu
AU - Tanaka, Manobu
AU - Uchida, Tomohisa
PY - 2011
Y1 - 2011
N2 - Special pattern in cosmic microwave background (CMB) polarization, B-modes, is a smoking-gun signature of primordial gravitational waves. Q/U Imaging ExperimenT-II (QUIET-II) is being proposed to detect the B-modes using the world's largest coherent polarimeter array (2,000 channels). Having a large number of polarimeters is the generic strategy of the CMB polarization experiments to improve the statistics. Unique detection technique using QUIET's polarimeters, modulation/demodulation scheme, enables us to directly extract polarization signal. The extracted signal is free from non-polarized components and intrinsic 1/f noise. We developed a data readout system including on-board demodulation function for the QUIET-II experiment. We employ a "master" clock strategy. This strategy guarantees phase matching between the modulation on the polarimeters and the demodulation on ADC modules. The single master organizes to generate all carrier clocks and distribute them to each module. The developed electronics, clock modules and the ADC modules, fulfill requirements. Tests with similar setup to the real observation proved that the system works properly. Their performances are confirmed to be suitable for the B-mode measurements.
AB - Special pattern in cosmic microwave background (CMB) polarization, B-modes, is a smoking-gun signature of primordial gravitational waves. Q/U Imaging ExperimenT-II (QUIET-II) is being proposed to detect the B-modes using the world's largest coherent polarimeter array (2,000 channels). Having a large number of polarimeters is the generic strategy of the CMB polarization experiments to improve the statistics. Unique detection technique using QUIET's polarimeters, modulation/demodulation scheme, enables us to directly extract polarization signal. The extracted signal is free from non-polarized components and intrinsic 1/f noise. We developed a data readout system including on-board demodulation function for the QUIET-II experiment. We employ a "master" clock strategy. This strategy guarantees phase matching between the modulation on the polarimeters and the demodulation on ADC modules. The single master organizes to generate all carrier clocks and distribute them to each module. The developed electronics, clock modules and the ADC modules, fulfill requirements. Tests with similar setup to the real observation proved that the system works properly. Their performances are confirmed to be suitable for the B-mode measurements.
UR - http://www.scopus.com/inward/record.url?scp=84863386963&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84863386963&partnerID=8YFLogxK
U2 - 10.1109/NSSMIC.2011.6154610
DO - 10.1109/NSSMIC.2011.6154610
M3 - Conference contribution
AN - SCOPUS:84863386963
SN - 9781467301183
T3 - IEEE Nuclear Science Symposium Conference Record
SP - 1244
EP - 1251
BT - 2011 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2011 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011
Y2 - 23 October 2011 through 29 October 2011
ER -