Telecon 20170828
Agenda:
Notes:
Attending: Shaul, Amy, Brian, Kris, Julian, Karl, Qi, Brad, Roger, Jacques, Bill
pre meeting comments:
Current status (Shaul)
flow chart indicates various areas of work and
Preliminary, to see where we are and illustrate how different parts interact
Noise Model (Karl)
White noise level only.
NEPs and NET have been calculated
Readout was from EBEX, more information of readout system is needed for estimation of noise in near future
Photon correlation noise = 1
probably needs to be investigated
different for space and ground-based missions
Thermal power law index n: 2 is more proper
Zodiacal light might be included
negligible in terms of loading from simulation (Jacques)
galaxy also negligible in terms of loading
10 ms bolo time constant does NOT matter here
P_readout > P_photon at lowest bands near 20
GHz Next steps:
go from single detector —> multi-chroic —> full focal plane
Roger to use his model to calculate noise and cross check on 1 week timescale
1 / f needs to be modeled as well
Roger will lead collection of information, check in at 2 weeks.
Julian has machinery to simulate given a noise spectrum.
correlated noise will need more inputs
data from Plank for satellite related issues
data from SPT, BICEP, etc for crosstalk numbers.
for TDM capacitance of wiring is critical to limit noise
what are key points for FDM?
Scanning (Kris)
basic model of single pixel with completely smooth scan.
ability to reconstruct polarization maps looks reasonable, but Kris not convinced
more complete models with multiple detectors, and a plan for how to combine them is needed.
some of the has been done for CORE and LightBIRD.
Kris to look into these papers
Jacques to ask European community what they can contribute and what time availability they have. ETA 1 week.
Kris-Jacques will meet Sept. 18-19 to discuss face-to-face.