The Path to CMBPol - Upcoming Measurements of CMB Polarization

WORKSHOP PRESENTATIONS

1.	Daniel Baumann (Harvard University) Talk: *Theory Review* Session: Introduction July 1, 2009 (9:10 AM - 9:50 AM) PDF
2.	Colin Bischoff (University of Chicago / KICP) Talk: *CAPMAP* Session: Results and lessons learned from recent experiments July 1, 2009 (11:30 AM - 11:45 AM) PDF
3.	Jamie Bock (Jet Propulsion Lab / Caltech) Talk: *EPIC-Intermediate Mission Overview* Session: The EPIC mission July 3, 2009 (9:00 AM - 9:25 AM) PPT The Experimental Probe of Inflationary Cosmology is a CMB polarization mission concept of a fourth-generation CMB satellite experiment following COBE, WMAP, and Planck. EPIC is based on scan-modulated imaging polarized bolometer pairs, similar to the methodology developed by experiments such as BICEP, QUAD and Planck. Large-format bolometer arrays, providing a significant gain in sensitivity over Planck, operate in multiple bands from 30 to 850 GHz. We have developed a new 'intermediate concept' based on a 1.4 m crossed-Dragone telescope and a large multi-band focal plane. The highest frequency bands will be used to map the structure of the Galactic magnetic field using polarized dust emission. The combination of high sensitivity and arcminute resolution enables a comprehensive measurement of the inflationary B-mode spectrum, the lensing B-mode spectrum, and the scalar E-mode spectrum to astrophysical or cosmological limits. We present an overall analysis of the capabilties and resources for the mission, as well as detailed designs for the focal plane, optics, and cooling systems.
4.	Hsin Cynth Chiang (Princeton University) Talk: *Measurement of CMB Polarization Power Spectra from Two Years of BICEP Data* Session: Results and lessons learned from recent experiments July 1, 2009 (12:05 PM - 12:30 PM) PDF
5.	Mark Dragovan (Jet Propulsion Lab) Talk: *Far-Sidelobe Analysis* Session: The EPIC mission July 3, 2009 (9:55 AM - 10:05 AM)
6.	Joanna Dunkley (Oxford University) Talk: *Foreground review* Session: Introduction July 1, 2009 (9:50 AM - 10:20 AM) PDF
7.	Joseph W. Fowler (Princeton University) Talk: *Development of the Atacama B-mode Search* Session: Status, plans and prospects of upcoming experiments (II) July 2, 2009 (9:30 AM - 9:50 AM) PPT We describe an instrument currently being built to study CMB polarization from the ground, the Atacama B-mode Search (ABS). ABS will contain crossed-Gregorian mirrors inside the cryostat, with polarization-sensitive bolometers fabricated at NIST and direct-machined corrugated feeds in the focal plane.
8.	Aurelien A. Fraisse (Princeton University) Talk: *Improving Galactic Foreground Models through Dust Studies* Session: Status, plans and prospects of upcoming experiments (II) July 2, 2009 (12:20 PM - 12:30 PM) Building a reliable Galactic foreground model is an essential step in the community's quest to detect the signature of primordial gravitational waves in the CMB. Such a model isnot only necessary to assess a mission's ability to detect B-modes given a value of the tensor-to-scalar ratio, it is also a key component of any data analysis aiming at separating this signal from the polarized Galactic emissions. Here, we report on two studies that will help improve the Galactic foreground models available to the CMB community. First, we present calculations of the polarized far-infrared (FIR) and submillimeter (submm) emission from interstellar dust. We show that the dust properties required to reproduce the observed extinction and polarization of starlight at UV to near-infrared wavelengths lead to a substantial wavelength dependent linear polarization of the thermal emission from interstellar dust at FIR and submm wavelengths. Although both the degree of linear polarization and its variation with wavelength are model dependent, our results can be gathered in two classes of models, each leading to a well defined prediction. We also present preliminary results of an observational campaign aiming at building a high Galactic latitude dust template through starlight polarization observations. We have already observed over 600 stars in the region (\|b\| > 20 deg, \|z\| > 200 pc), which corresponds to fourteen times more data than available in the Heiles sample in the same region, over significantly more sky than covered by the Berdyugin sample. Our survey will ultimately provide starlight polarization data for a sample of stars uniformly distributed over the entire high latitude Southern sky with high enough density to map the high latitude Galactic magnetic field down to its coherence scale.
9.	Walter K. Gear (Cardiff University) Talk: *Clover* Session: Status, plans and prospects of upcoming experiments (II) July 2, 2009 (11:20 AM - 11:40 AM) PDF
10.	Ricardo T. Genova-Santos (Instituto de Astrofisica de Canarias) Talk: *The QUIJOTE-CMB experiment* Session: Status, plans and prospects of upcoming experiments (II) July 2, 2009 (11:40 AM - 12:00 PM) PPT I will present a description of QUIJOTE (QUI-JOint TEnerife experiment), a new experiment dedicated to observe the polarization of the CMB, which will start operations this summer from the Teide Observatory (Spain). QUIJOTE will perform observations at five frequencies between 11 and 30 GHz and with angular resolutions between 1 and 0.4 degrees. It will cover around one fourth of the sky with sensitivity of about 4 muK per one degree beam after one year of operation with its low-frequency instrument (11-19 GHz) and less than 1 muK with its high-frequency (30 GHz) instrument. The signal to noise will be sufficient by the end of 2011 (2015) to detect the imprint of gravitational B-modes if they have an amplitude of at least r=0.1 (0.05). QUIJOTE will also be important because it will provide essential information of the polarization of the synchrotron and the anomalous microwave emissions from our Galaxy at low frequencies (10-20 GHz). In this respect, these data will be a valuable complement for the Planck mission.
11.	Nils W. Halverson (University of Colorado) Talk: *SPTpol: A polarimeter for the South Pole Telescope* Session: Status, plans and prospects of upcoming experiments (II) July 2, 2009 (9:50 AM - 10:20 AM) PDF I will discuss science goals and instrument development for a next-generation CMB polarization receiver for the South Pole Telescope (SPT).
12.	Gary Hinshaw (NASA Goddard) Talk: *Polarization Systematics in WMAP* Session: Results and lessons learned from recent experiments July 1, 2009 (11:00 AM - 11:30 AM) PPT I will discuss the sources of systematic error in the WMAP polarization data and present the steps taken to characterize and mitigate them. Lessons for future experiments will be highlighted.
13.	Warren Holmes (JPL/Caltech) Talk: *Cooling the EPIC Telescope and Focal Plane* Session: The EPIC mission July 3, 2009 (10:05 AM - 10:25 AM) PPT
14.	William Jones (Princeton University) Talk: *SPIDER* Session: Status, plans and prospects of upcoming experiments (I) July 1, 2009 (3:40 PM - 4:10 PM) PPT
15.	Brian G. Keating (University of California San Diego) Talk: *Systematic Error Analysis and Challenges* Session: The EPIC mission July 3, 2009 (10:25 AM - 10:40 AM) PPT
16.	Al Kogut (GSFC) Talk: *Primordial Inflation Polarization Explorer (PIPER)* Session: Status, plans and prospects of upcoming experiments (I) July 1, 2009 (4:10 PM - 4:40 PM) PDF The Primordial Inflation Polarization Explorer is a balloon-borne instrument to measure the polarization of the cosmic microwave background in order to detect the characteristic signature of gravity waves created during an inflationary epoch in the early universe. PIPER combines cold (1.5 K) optics, 5120 bolometric detectors, and rapid polarization modulation using VPM grids to achieve both high sensitivity and excellent control of systematic errors. I will discuss the current status and plans for the PIPER instrument.
17.	John Kovac (Caltech / Harvard) Talk: *BICEP2/Keck* Session: Status, plans and prospects of upcoming experiments (II) July 2, 2009 (9:00 AM - 9:30 AM) PDF
18.	Chao-Lin Kuo (Stanford/SLAC) Talk: *Prospects for lensing measurements from the ground* Session: Beyond the current round - alternate expt techniques, lensing/de-lensing, reionization etc July 2, 2009 (3:55 PM - 4:20 PM) PPT
19.	Akito Kusaka (University of Chicago, KICP) Talk: *QUIET* Session: Status, plans and prospects of upcoming experiments (I) July 1, 2009 (2:10 PM - 2:40 PM) PDF
20.	Andrew E. Lange (California Institute of Technology) Talk: *PLANCK hardware and status* Session: Status, plans and prospects of upcoming experiments (I) July 1, 2009 (1:30 PM - 1:50 PM) PDF
21.	Adrian T. Lee (University of California, Berkeley) Talk: *Focal Plane Design and Technology* Session: The EPIC mission July 3, 2009 (9:25 AM - 9:40 AM) PDF
22.	Stephan Meyer (University of Chicago) Talk: *Summary of Mission Concept Study Reports* Session: Introduction July 1, 2009 (10:20 AM - 10:40 AM) PDF
23.	Amber Miller (Columbia University) Talk: *EBEX* Session: Status, plans and prospects of upcoming experiments (I) July 1, 2009 (2:40 PM - 3:10 PM) PDF
24.	Michael Mortonson (University of Chicago) Talk: *Reionization science with future CMB polarization studies* Session: Beyond the current round - alternate expt techniques, lensing/de-lensing, reionization etc July 2, 2009 (4:20 PM - 4:50 PM) PPT
25.	Michael D. Niemack (National Institute of Standards and Technology) Talk: *ACTpol: A polarization sensitive receiver for the Atacama Cosmology Telescope* Session: Status, plans and prospects of upcoming experiments (II) July 2, 2009 (10:50 AM - 11:20 AM) PDF
26.	Timothy J. Pearson (California Institute of Technology) Talk: *C-BASS: C-Band All-Sky Survey* Session: Status, plans and prospects of upcoming experiments (II) July 2, 2009 (12:00 PM - 12:20 PM) PDF C-BASS is a project to image the whole sky at 5 GHz, measuring both brightness and polarization. The C-BASS receiver is a hybrid of a broad-band (1 GHz) correlation polarimeter and a correlation radiometer. The polarimeter design is optimized for extremely low cross-polarization, while the radiometer uses temperature-stabilized 4 K loads to allow accurate total power measurements. In order to cover the whole sky, it will be mounted on two separate telescopes: a 6.1-m at the Owens Valley Radio Observatory in California, and a 7.6-m in South Africa. The survey resolution will be 0.85 deg with a sensitivity of < 0.1 mK/beam rms in Stokes I, Q, and U. Observations for the northern survey will start in 2009, and the survey should be completed by 2011. The C-BASS survey will be the first survey of diffuse Galactic emission at a frequency low enough to be dominated by synchrotron radiation but high enough to be uncorrupted by Faraday rotation effects. The all-sky maps produced by the survey will be key to enabling accurate subtraction of foreground contaminating signals from higher-frequency CMB polarization sky surveys, including WMAP and Planck. The C-BASS survey will also be a major resource for studying the interstellar medium and magnetic field of the Galaxy. The C-BASS project is a collaboration between Caltech/JPL in the US, Oxford and Manchester Universities in the UK, and Rhodes University and the Hartebeesthoek Radio Astronomy Observatory in South Africa. It is funded by the NSF (AST-0607857) and the participating institutions.
27.	Clement L. Pryke (University of Chicago) Talk: *Systematics in the QUaD experiment* Session: Results and lessons learned from recent experiments July 1, 2009 (11:45 AM - 12:05 PM) PDF The QUaD experiment achieved ground breaking results in spite of systematic problems. I will describe these problems and the mitigation thereof as potential lessons for future experiments.
28.	Clement L. Pryke (University of Chicago) Talk: *Opening remarks* Session: Introduction July 1, 2009 (9:00 AM - 9:10 AM) PDF
29.	Kendrick Smith (University of Cambridge) Talk: *Prospects for de-lensing* Session: Beyond the current round - alternate expt techniques, lensing/de-lensing, reionization etc July 2, 2009 (3:10 PM - 3:55 PM) PDF
30.	Peter Timbie (University of Wisconsin - Madison) Talk: *Bolometric Interferometry: MBI and QUBIC* Session: Beyond the current round - alternate expt techniques, lensing/de-lensing, reionization etc July 2, 2009 (2:20 PM - 2:40 PM) PPT Adding interferometers using bolometric detectors offer an intriguing alternative to imaging approaches to measuring CMB polarization. I will describe the general scheme, show recent results from the MBI-4 instrument, and outline the design of a future instrument called QUBIC.
31.	Huan T Tran (UC Berkeley) Talk: *POLARBEAR* Session: Status, plans and prospects of upcoming experiments (I) July 1, 2009 (4:40 PM - 5:10 PM) PPT POLARBEAR is a ground-based experiment constructed to measure polarization anisotropy in the Cosmic Microwave Background. It is designed to have a combination of sensitivity, foreground mitigation, and rejection of systematic errors to search for the B-mode signature of Inflationary gravity. POLARBEAR is designed to detect a gravitational-wave signature with a tensor-to-scalar ratio r as low as 0.025 (95% confidence). POLARBEAR will also measure polarized lensing of the Cosmic Microwave Background. POLARBEAR will have a 3.5 meter primary meter giving it an angular resolution of 4.0’ at its main observation frequency band centered at 150 GHz. The 250 mK focal plane design contains 637 dualpolarization pixels (1274 bolometers) that are coupled to the telescope using microlithographed planar antennas. The experiment will be sited in the Atacama Desert in Chile at 5000 meter (16,500 ft) altitude after a prototype testing stage at Cedar Flats California.
32.	Huan T Tran (UC Berkeley) Talk: *Crossed-Dragone Optical Design* Session: The EPIC mission July 3, 2009 (9:40 AM - 9:55 AM) PPT