Bulletin of the American Physical Society
APS April Meeting 2016
Volume 61, Number 6
Saturday–Tuesday, April 16–19, 2016; Salt Lake City, Utah
Session J11: Inflation Probe Science Interest GroupFocus
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Sponsoring Units: DAP Chair: Edward Wollack, NASA/Goddard Space Flight Center Room: 250C |
Sunday, April 17, 2016 10:45AM - 11:21AM |
J11.00001: Inflation probe Science Interest Group Invited Speaker: Jamie Bock |
Sunday, April 17, 2016 11:21AM - 11:33AM |
J11.00002: Lessons Learned from Planck Charles Lawrence Planck's measurements of the microwave sky at seven frequencies spanning 30 to 353 GHz represent an important advance in our understanding of both the cosmic microwave background (CMB) radiation and the properties of astrophysical foregrounds. I will discuss the lessons learned from Planck for future experiments, particularly in the areas of foreground confusion and systematic errors that will set the ultimate limits to what can learned from CMB polarization. [Preview Abstract] |
Sunday, April 17, 2016 11:33AM - 11:45AM |
J11.00003: Planned CMB Satellite Mission Overview Adrian Lee I will summarize space missions that are in the planning stage to measure the polarized spatial fluctuations of the cosmic microwave background (CMB). Space missions are complementary to ground-based observatories. First, the absence of atmospheric emission results in a wider range of frequencies that can be observed, which in turn improves removal of galactic foreground emission. Second, the stable observations possible from space give high-fidelity measurements at angular scales of tens of degrees where inflation theory predicts a peak in the B-mode angular power spectrum. Robust detection of both this ``reionization" peak and the ``recombination" peak at degree angular scales will give the most convincing case that the fingerprints of inflation have been detected. CMB polarization space missions in the planning stage include CORE+, LiteBIRD, and PIXIE. Science goals for all these missions include the detection and characterization of inflation and the characterization of the reionization epoch. CORE+ and LiteBIRD are imaging telescopes with sub-Kelvin superconducting focal-plane detector arrays with several thousand detectors. PIXIE is a two-beam differential spectrometer that will measure the Planck spectrum of the CMB in addition to searching for inflation. [Preview Abstract] |
Sunday, April 17, 2016 11:45AM - 11:57AM |
J11.00004: Overview of Current and Planned CMB Ballooning Efforts Shaul Hanany Balloon-borne experiments have a unique role in probing the polarization of the CMB. They enable access to frequencies that can not be probed by ground-based instruments, they can straight-forwardly measure signals on large angular scales, and they serve as test-beds for technologies that are ultimately used on space missions. With these roles in mind, I will discuss the status of the three NASA-funded experiments EBEX, SPIDER and PIPER, and their complementarity with ground-based efforts. I will also discuss plans for next generation instruments, with which the detector count is expected to increase by another factor of 10 to about 10,000. [Preview Abstract] |
Sunday, April 17, 2016 11:57AM - 12:09PM |
J11.00005: Landscape of Ground-Based CMB Polarization Measurements John Carlstrom After a review of the current state of ground-based CMB measurements, this talk will outline the ambitious plans of the community to greatly increase the sensitivity and science reach of the ground-based program with a next generation experiment, CMB-S4. Following the detection of CMB polarization by the DASI experiment located at the South Pole in 2002, the current generation of ground-based experiments each fielding of order 1000 superconducting detectors (Stage II experiments) have led to the first detection of the much fainter lensing B-mode polarization signal and the most stringent constraints on the level of the B-mode signal from inflationary gravitational waves. We can expect significant advances in the next few years as the ongoing ground-based experiments deploy of order 10,000 detectors (Stage III). The CMB community is now planning an ambitious next generation (Stage IV) ground-based program with order of 500,000 detectors, CMB-S4, to achieve critical threshold crossing goals of 1) detecting or ruling out large field inflationary models, 2) determining the effective number and masses of the neutrinos, and 3) providing precision constraints on dark energy through its impact on structure formation. [Preview Abstract] |
Sunday, April 17, 2016 12:09PM - 12:21PM |
J11.00006: Technology Landscape for the Inflation Probe Michael Niemack Substantial progress is being made with ground-based and balloon-borne cosmic microwave background (CMB) observations in advancing technology readiness levels of the suite of technologies required for the Inflation Probe. We describe the CMB technology landscape and review the status of detectors, detector array readout systems, reflective and refractive optics, and cryogenic cooling systems that are candidate technologies for the Inflation Probe. [Preview Abstract] |
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