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Astrophysics Luncheon Seminar

The TIME-Pilot CII Intensity Mapping Experiment to Study the Epoch of Reionization
Presented by Abigail Crites
Keck Institute for Space Studies, California Institute of Technology

Monday, June 8, 2015
12:00 noon in 169-336

Abstract
I will present an overview of the science and instrumentation for a new instrument, TIME-Pilot (Tomographic Ionized-Carbon Mapping Experiment). TIME-Pilot is designed to make measurements from the Epoch of Reionization (EoR), when the first stars and galaxies formed and ionized the intergalactic medium. This will be done via measurements of the redshifted 157.7 micron line of singly ionized carbon ([CII]). In particular, TIME-Pilot will produce the first detection of [CII] clustering fluctuations, a signal proportional to the integrated [CII] intensity, summed over all EoR galaxies. TIME-Pilot is thus sensitive to the emission from dwarf galaxies, thought to be responsible for the balance of ionizing UV photons, that will be difficult to detect individually with JWST and ALMA. TIME-Pilot will employ a linear array of spectrometers, each consisting of a parallel-plate diffraction grating. The spectrometer bandwidth covers 185-323 GHz to both probe the entire redshift range of interest and to include channels at the edges of the band for atmospheric noise mitigation. The 1840 detectors will be Transition Edge Sensor bolometers read out with the NIST time-domain-multiplexing (TDM) scheme and cooled to a base temperature of 250 mK with a 3He sorption refrigerator.

JPL Contact: Olivier Dore (4-0690)


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