Difference between revisions of "Delensing sensitivity - preliminary results"

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This table summarizes the expected level of lensing residual and sigma(r) for the different delensing LAT configurations combined with the DSR configuration for the SATs. Victor Buza provided Fisher forecasts without decorrelation for comparison, as well as results with decorrelation, which was used as the DSR baseline.
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This table summarizes the expected level of lensing residual and sigma(r) for the different delensing LAT configurations combined with the DSR configuration for the SATs. Victor Buza provided Fisher forecasts without decorrelation for comparison, as well as results with decorrelation, which was used as the DSR baseline. For comparison, the configuration assumed for the DSR forecasts corresponds to AL=0.081 and sigma(r)=3.9e-4 assuming no decorrelation, and sigma(r)=5.1e-4 for the decorrelation model used as the baseline model for the DSR forecasts.
  
 
= Survey specifications =
 
= Survey specifications =

Revision as of 04:29, 10 June 2020

This posting compares forecasts for different configurations of the delensing LAT. The configurations are taken from this spreadsheet, and the efficiencies are taken from this analysis.

Summary

Frequency (GHz) A_L (quadratic) A_L (iterative) sigma(r) no decorr. RF sigma(r) no decorr. VB sigma(r) decorr. VB
V3R0 0.20 0.073 3.7e-4 3.7e-4 4.9e-4
V3R0 LF+ 0.20 0.076 3.8e-4 3.8e-4 5.0e-4
V3R0 MF+ 0.19 0.068 3.6e-4 3.5e-4 4.8e-4
V3R0 HF+ 0.20 0.078 3.9e-4 3.8e-4 5.0e-4
V3R0 25 0.19 0.065 3.5e-4 3.4e-4 4.7e-4
V3R0 MF+ 25 0.19 0.061 3.4e-4 3.3e-4 4.6e-4

This table summarizes the expected level of lensing residual and sigma(r) for the different delensing LAT configurations combined with the DSR configuration for the SATs. Victor Buza provided Fisher forecasts without decorrelation for comparison, as well as results with decorrelation, which was used as the DSR baseline. For comparison, the configuration assumed for the DSR forecasts corresponds to AL=0.081 and sigma(r)=3.9e-4 assuming no decorrelation, and sigma(r)=5.1e-4 for the decorrelation model used as the baseline model for the DSR forecasts.

Survey specifications

The survey duration is assumed to be 7 years, and the hits map is taken to be pole deep v1 described here

Duration (yrs) 7
fsky_signal (%) 1.93
fsky_noise (%) 2.88
fsky_cross (%) 2.45

SAT specifications

The forecasts of sigma(r) assume the DSR SAT configuration. The expected noise levels for this survey are

Frequency (GHz) 30 40 85 95 145 155 220 270
Beam FWHM (arcmin) 72.8 72.8 25.5 22.7 25.5 22.7 13.0 13.0
noise T (uK-arcmin) 5.64 7.14 1.41 1.24 2.71 2.90 7.50 12.85
l_knee T 150 150 150 150 230 230 230 230
exponent T -4.4 -4.4 -4.4 -4.4 -3.8 -3.8 -3.8 -3.8
noise E (uK-arcmin) 3.74 4.73 0.93 0.82 1.25 1.34 3.48 8.08
l_knee E 60 60 60 60 65 65 65 65
exponent E -2.2 -2.2 -2.2 -2.2 -3.1 -3.1 -3.1 -3.1
noise B (uK-arcmin) 3.53 4.46 0.88 0.78 1.23 1.34 3.48 5.97
l_knee B 60 60 60 60 60 60 60 60
exponent B -1.7 -1.7 -1.7 -1.7 -3.0 -3.0 -3.0 -3.0

V3R0

The instrument is characterized by

Frequency (GHz) 20 27 39 93 145 225 278
Tubes 1 2 2 12 12 4 4
Wafers/tube 4 4 4 4 4 4 4
Wafer NET (uK-rts) 77.43 63.74 41.01 15.55 14.37 20.88 49.46
Band NET (uK-rts) 38.72 22.54 14.50 2.24 2.07 5.22 12.37
f_year 0.70 0.70 0.70 0.70 0.70 0.70 0.70
f_scan 0.80 0.80 0.80 0.80 0.80 0.80 0.80
f_pass 0.69 0.69 0.69 0.69 0.69 0.69 0.69
efficiency 0.39 0.39 0.39 0.39 0.39 0.39 0.39

This leads to the following expected performance

Frequency (GHz) 20 27 39 93 145 225 278
Beam FWHM (arcmin) 10.0 7.4 5.1 2.2 1.4 1.0 0.9
noise T (uK-arcmin) 8.67 5.05 3.25 0.50 0.46 1.17 2.77
l_knee T 700 700 700 700 700 700 700
exponent T -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2
noise E (uK-arcmin) 12.26 7.14 4.59 0.71 0.66 1.65 3.92
l_knee E 150 150 150 150 200 200 200
exponent E -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2
noise B (uK-arcmin) 12.26 7.14 4.59 0.71 0.66 1.65 3.92
l_knee B 150 150 150 150 200 200 200
exponent B -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2

V3R0 LF+

The instrument is characterized by

Frequency (GHz) 20 27 39 93 145 225 278
Tubes 1 4 4 11 11 3 3
Wafers/tube 4 4 4 4 4 4 4
Wafer NET (uK-rts) 77.43 63.74 41.01 15.55 14.37 20.88 49.46
Band NET (uK-rts) 38.72 15.94 10.25 2.34 2.17 6.03 14.28
f_year 0.70 0.70 0.70 0.70 0.70 0.70 0.70
f_scan 0.80 0.80 0.80 0.80 0.80 0.80 0.80
f_pass 0.69 0.69 0.69 0.69 0.69 0.69 0.69
efficiency 0.39 0.39 0.39 0.39 0.39 0.39 0.39

This leads to the following expected performance

Frequency (GHz) 20 27 39 93 145 225 278
Beam FWHM (arcmin) 10.0 7.4 5.1 2.2 1.4 1.0 0.9
noise T (uK-arcmin) 8.67 3.57 2.30 0.52 0.49 1.35 3.20
l_knee T 700 700 700 700 700 700 700
exponent T -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2
noise E (uK-arcmin) 12.26 5.05 3.25 0.74 0.69 1.91 4.52
l_knee E 150 150 150 150 200 200 200
exponent E -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2
noise B (uK-arcmin) 12.26 5.05 3.25 0.74 0.69 1.91 4.52
l_knee B 150 150 150 150 200 200 200
exponent B -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2

V3R0 MF+

The instrument is characterized by

Frequency (GHz) 20 27 39 93 145 225 278
Tubes 1 2 2 14 14 2 2
Wafers/tube 4 4 4 4 4 4 4
Wafer NET (uK-rts) 77.43 63.74 41.01 15.55 14.37 20.88 49.46
Band NET (uK-rts) 38.72 22.54 14.50 2.08 1.92 7.38 17.49
f_year 0.70 0.70 0.70 0.70 0.70 0.70 0.70
f_scan 0.80 0.80 0.80 0.80 0.80 0.80 0.80
f_pass 0.69 0.69 0.69 0.69 0.69 0.69 0.69
efficiency 0.39 0.39 0.39 0.39 0.39 0.39 0.39

This leads to the following expected performance

Frequency (GHz) 20 27 39 93 145 225 278
Beam FWHM (arcmin) 10.0 7.4 5.1 2.2 1.4 1.0 0.9
noise T (uK-arcmin) 8.67 5.05 3.25 0.47 0.43 1.65 3.92
l_knee T 700 700 700 700 700 700 700
exponent T -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2
noise E (uK-arcmin) 12.26 7.14 4.59 0.66 0.61 2.34 5.54
l_knee E 150 150 150 150 200 200 200
exponent E -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2
noise B (uK-arcmin) 12.26 7.14 4.59 0.66 0.61 2.34 5.54
l_knee B 150 150 150 150 200 200 200
exponent B -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2

V3R0 HF+

The instrument is characterized by

Frequency (GHz) 20 27 39 93 145 225 278
Tubes 1 2 2 10 10 6 6
Wafers/tube 4 4 4 4 4 4 4
Wafer NET (uK-rts) 77.43 63.74 41.01 15.55 14.37 20.88 49.46
Band NET (uK-rts) 38.72 22.54 14.50 2.46 2.27 4.26 10.10
f_year 0.70 0.70 0.70 0.70 0.70 0.70 0.70
f_scan 0.80 0.80 0.80 0.80 0.80 0.80 0.80
f_pass 0.69 0.69 0.69 0.69 0.69 0.69 0.69
efficiency 0.39 0.39 0.39 0.39 0.39 0.39 0.39


This leads to the following expected performance

Frequency (GHz) 20 27 39 93 145 225 278
Beam FWHM (arcmin) 10.0 7.4 5.1 2.2 1.4 1.0 0.9
noise T (uK-arcmin) 8.67 5.05 3.25 0.55 0.51 0.95 2.26
l_knee T 700 700 700 700 700 700 700
exponent T -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2
noise E (uK-arcmin) 12.26 7.14 4.59 0.78 0.72 1.35 3.20
l_knee E 150 150 150 150 200 200 200
exponent E -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2
noise B (uK-arcmin) 12.26 7.14 4.59 0.78 0.72 1.35 3.20
l_knee B 150 150 150 150 200 200 200
exponent B -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2

V3R0 25

The instrument is characterized by

Frequency (GHz) 20 27 39 93 145 225 278
Tubes 1 2 2 12 12 4 4
Wafers/tube 4 4 4 4 4 4 4
Wafer NET (uK-rts) 69.25 57.01 36.68 13.91 12.85 18.68 44.24
Band NET (uK-rts) 34.62 20.16 12.97 2.01 1.85 4.67 11.06
f_year 0.70 0.70 0.70 0.70 0.70 0.70 0.70
f_scan 0.80 0.80 0.80 0.80 0.80 0.80 0.80
f_pass 0.69 0.69 0.69 0.69 0.69 0.69 0.69
efficiency 0.39 0.39 0.39 0.39 0.39 0.39 0.39


This leads to the following expected performance

Frequency (GHz) 20 27 39 93 145 225 278
Beam FWHM (arcmin) 10.0 7.4 5.1 2.2 1.4 1.0 0.9
noise T (uK-arcmin) 7.75 4.51 2.90 0.45 0.42 1.05 2.48
l_knee T 700 700 700 700 700 700 700
exponent T -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2
noise E (uK-arcmin) 10.97 6.38 4.11 0.64 0.59 1.48 3.50
l_knee E 150 150 150 150 200 200 200
exponent E -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2
noise B (uK-arcmin) 10.97 6.38 4.11 0.64 0.59 1.48 3.50
l_knee B 150 150 150 150 200 200 200
exponent B -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2

V3R0 MF+ 25

The instrument is characterized by

Frequency (GHz) 20 27 39 93 145 225 278
Tubes 1 2 2 14 14 2 2
Wafers/tube 4 4 4 4 4 4 4
Wafer NET (uK-rts) 69.25 57.01 36.68 13.91 12.85 18.68 44.24
Band NET (uK-rts) 34.62 20.16 12.97 1.86 1.72 6.60 15.64
f_year 0.70 0.70 0.70 0.70 0.70 0.70 0.70
f_scan 0.80 0.80 0.80 0.80 0.80 0.80 0.80
f_pass 0.69 0.69 0.69 0.69 0.69 0.69 0.69
efficiency 0.39 0.39 0.39 0.39 0.39 0.39 0.39


This leads to the following expected performance

Frequency (GHz) 20 27 39 93 145 225 278
Beam FWHM (arcmin) 10.0 7.4 5.1 2.2 1.4 1.0 0.9
noise T (uK-arcmin) 7.75 4.51 2.90 0.42 0.38 1.48 3.50
l_knee T 700 700 700 700 700 700 700
exponent T -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2
noise E (uK-arcmin) 10.97 6.38 4.11 0.59 0.54 2.09 4.95
l_knee E 150 150 150 150 200 200 200
exponent E -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2
noise B (uK-arcmin) 10.97 6.38 4.11 0.59 0.54 2.09 4.95
l_knee B 150 150 150 150 200 200 200
exponent B -2.7 -2.7 -2.7 -2.6 -2.2 -2.2 -2.2