CMBS4 Band Sensitivity Comparison

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Revision History

Current version = 1.0

v1.0 published on 2017-01-23 by C. Hill

Introduction

This page is dedicated to logging calculations of band sensitivities of various proposed frequency configurations for CMB-S4.

Band configurations are taken from this Google Doc (as of 2016-12-23).

Assumptions

Below are input assumptions that are common to all calculations.

Parameter Value Comment
Band Shape Top Hat
PWV 1 mm
Elevation 60 deg (30deg from Zenith)
Optical Efficiency 0.30
Telescope Temp [K] 15.0
Bath Temp [K] 0.100, 0.250 Considering both a Dil fridge or ADR, and a He3 fridge
Transition Temp [K] 0.171, 0.427 1.71*Tbath
Saturation Power 2.5*Popt Safety factor for ETF stability
Number of detectors 3794*(fcent/150 GHz)2 PB2 FOV, ~1.8*F\lambda detector spacing at 150 GHz

To simulate the sky temperature, we use the AM code using two different configuration files:

  • "Stock" are from the AM cookbook directory: example configuration files
  • "Paine" are updated files from Scott Paine, provided by Denis Barkats

We consider both the Atacama and South Pole sites.

"Buza" Config

Buza bandPlot.jpg

250 mK

Band Center [GHz] Frac BW Tsky (Atacama) [K] Tsky (Pole) [K] Tsky (Atacama, Paine) [K] Tsky (Pole, Paine) [K] NET (Atacama)
[μK sqrt(s)]
NET (Pole)
[μK sqrt(s)]
NET (Atacama, Paine)
[μK sqrt(s)]
NET (Pole, Paine)
[μK sqrt(s)]
NETarr (Atacama)
[μK sqrt(s)]
NETarr (Pole)
[μK sqrt(s)]
NETarr (Atacama, Paine)
[μK sqrt(s)]
NETarr (Pole, Paine)
[μK sqrt(s)]
30 0.30 5.6 7.0 4.7 6.1 317 333 307 323 25.7 27.0 24.9 26.2
40 0.30 9.7 13.5 8.4 12.4 327 365 313 354 19.9 22.2 19.1 21.5
85 0.24 12.1 17.0 9.6 14.1 332 376 309 350 9.5 10.8 8.8 10.0
95 0.24 10.2 14.0 7.5 10.6 315 350 291 320 8.1 9.0 7.5 8.2
145 0.22 11.3 14.5 7.4 8.0 392 425 350 357 6.6 7.1 5.9 6.0
155 0.22 12.9 16.1 8.5 8.0 428 463 380 375 6.7 7.3 6.0 5.9
215 0.22 21.0 25.9 14.3 12.2 754 827 654 621 8.5 9.4 7.4 7.0
270 0.18 27.1 33.4 18.6 16.1 1492 1647 1276 1210 13.5 14.9 11.5 10.9

100 mK

Buza

Band Center [GHz] Frac BW Tsky (Atacama) [K] Tsky (Pole) [K] Tsky (Atacama, Paine) [K] Tsky (Pole, Paine) [K] NET (Atacama)
[μK sqrt(s)]
NET (Pole)
[μK sqrt(s)]
NET (Atacama, Paine)
[μK sqrt(s)]
NET (Pole, Paine)
[μK sqrt(s)]
NETarr (Atacama)
[μK sqrt(s)]
NETarr (Pole)
[μK sqrt(s)]
NETarr (Atacama, Paine)
[μK sqrt(s)]
NETarr (Pole, Paine)
[μK sqrt(s)]
30 0.30 5.6 7.0 4.7 6.1 278 293 268 283 22.5 23.8 21.7 23.0
40 0.30 9.7 13.5 8.4 12.4 291 329 278 318 17.7 20.0 16.9 19.3
85 0.24 12.1 17.0 9.6 14.1 302 345 280 320 8.7 9.9 8.0 9.2
95 0.24 10.2 14.0 7.5 10.6 287 320 264 291 7.4 8.2 6.8 7.5
145 0.22 11.3 14.5 7.4 8.0 362 394 322 328 6.1 6.6 5.4 5.5
155 0.22 12.9 16.1 8.5 8.0 397 430 350 345 6.2 6.8 5.5 5.4
215 0.22 21.0 25.9 14.3 12.2 711 782 613 581 8.1 8.9 6.9 6.6
270 0.18 27.1 33.4 18.6 16.1 1419 1572 1208 1143 12.8 14.2 10.9 10.3

"Suzuki" Config

Suzuki bandPlot.jpg

250 mK

Suzuki

Band Center [GHz] Frac BW Tsky (Atacama) [K] Tsky (Pole) [K] Tsky (Atacama, Paine) [K] Tsky (Pole, Paine) [K] NET (Atacama)
[μK sqrt(s)]
NET (Pole)
[μK sqrt(s)]
NET (Atacama, Paine)
[μK sqrt(s)]
NET (Pole, Paine)
[μK sqrt(s)]
NETarr (Atacama)
[μK sqrt(s)]
NETarr (Pole)
[μK sqrt(s)]
NETarr (Atacama, Paine)
[μK sqrt(s)]
NETarr (Pole, Paine)
[μK sqrt(s)]
21 0.25 5.8 6.2 5.1 4.9 406 412 396 393 47.0 47.7 45.9 45.6
25 0.25 5.8 6.5 5.0 5.3 377 387 366 371 36.7 37.7 35.7 36.1
29 0.25 5.4 6.7 4.6 5.8 350 366 339 355 29.4 30.8 28.4 29.8
34 0.25 6.4 8.4 5.4 7.5 341 365 329 353 24.4 26.1 23.6 25.3
40 0.25 9.5 13.2 8.1 12.0 355 396 341 383 21.6 24.1 20.7 23.3
87 0.15 10.7 14.9 8.2 11.9 404 452 375 418 11.3 12.6 10.5 11.7
95 0.30 10.6 14.7 7.9 11.3 286 319 264 292 7.3 8.2 6.8 7.5
102 0.15 10.7 14.9 7.9 11.1 408 455 376 413 9.7 10.9 9.0 9.9
140 0.13 10.9 14.0 7.2 8.1 494 535 443 455 8.6 9.3 7.7 7.9
150 0.25 12.0 15.2 7.9 7.9 383 414 341 342 6.2 6.7 5.5 5.6
160 0.13 13.5 16.8 8.8 8.1 581 627 513 502 8.8 9.5 7.8 7.6
220 0.20 20.3 25.0 13.7 11.9 811 887 702 673 9.0 9.8 7.8 7.4
245 0.20 23.2 28.6 15.8 14.0 1054 1157 909 871 10.5 11.5 9.0 8.7
270 0.20 27.2 33.4 18.7 16.1 1414 1561 1209 1146 12.7 14.1 10.9 10.3

100 mK

Suzuki

Band Center [GHz] Frac BW Tsky (Atacama) [K] Tsky (Pole) [K] Tsky (Atacama, Paine) [K] Tsky (Pole, Paine) [K] NET (Atacama)
[μK sqrt(s)]
NET (Pole)
[μK sqrt(s)]
NET (Atacama, Paine)
[μK sqrt(s)]
NET (Pole, Paine)
[μK sqrt(s)]
NETarr (Atacama)
[μK sqrt(s)]
NETarr (Pole)
[μK sqrt(s)]
NETarr (Atacama, Paine)
[μK sqrt(s)]
NETarr (Pole, Paine)
[μK sqrt(s)]
21 0.25 5.8 6.2 5.1 4.9 354 359 344 342 41.0 41.7 39.9 39.6
25 0.25 5.8 6.5 5.0 5.3 329 339 319 323 32.1 33.0 31.1 31.5
29 0.25 5.4 6.7 4.6 5.8 306 322 295 311 25.7 27.0 24.8 26.1
34 0.25 6.4 8.4 5.4 7.5 300 323 289 312 21.5 23.1 20.7 22.3
40 0.25 9.5 13.2 8.1 12.0 316 356 302 344 19.3 21.7 18.4 20.9
87 0.15 10.7 14.9 8.2 11.9 367 414 339 381 10.3 11.6 9.5 10.7
95 0.30 10.6 14.7 7.9 11.3 260 292 239 266 6.7 7.5 6.1 6.8
102 0.15 10.7 14.9 7.9 11.1 373 419 341 378 8.9 10.0 8.1 9.0
140 0.13 10.9 14.0 7.2 8.1 455 495 406 418 7.9 8.6 7.1 7.3
150 0.25 12.0 15.2 7.9 7.9 355 385 314 315 5.8 6.2 5.1 5.1
160 0.13 13.5 16.8 8.8 8.1 539 584 474 463 8.2 8.9 7.2 7.0
220 0.20 20.3 25.0 13.7 11.9 764 839 659 630 8.5 9.3 7.3 7.0
245 0.20 23.2 28.6 15.8 14.0 998 1099 856 819 9.9 10.9 8.5 8.1
270 0.20 27.2 33.4 18.7 16.1 1345 1490 1144 1083 12.1 13.4 10.3 9.8

Config "A1"

A1 bandPlot.jpg

250 mK

A1

Band Center [GHz] Frac BW Tsky (Atacama) [K] Tsky (Pole) [K] Tsky (Atacama, Paine) [K] Tsky (Pole, Paine) [K] NET (Atacama)
[μK sqrt(s)]
NET (Pole)
[μK sqrt(s)]
NET (Atacama, Paine)
[μK sqrt(s)]
NET (Pole, Paine)
[μK sqrt(s)]
NETarr (Atacama)
[μK sqrt(s)]
NETarr (Pole)
[μK sqrt(s)]
NETarr (Atacama, Paine)
[μK sqrt(s)]
NETarr (Pole, Paine)
[μK sqrt(s)]
21 0.25 5.8 6.2 5.1 4.9 406 412 396 393 47.0 47.7 45.9 45.6
29 0.25 5.4 6.7 4.6 5.8 350 366 339 355 29.4 30.8 28.4 29.8
40 0.25 9.5 13.2 8.1 12.0 355 396 341 383 21.6 24.1 20.7 23.3
87 0.15 10.7 14.9 8.2 11.9 404 452 375 418 11.3 12.6 10.5 11.7
102 0.15 10.7 14.9 7.9 11.1 408 455 376 413 9.7 10.9 9.0 9.9
140 0.13 10.9 14.0 7.2 8.1 494 535 443 455 8.6 9.3 7.7 7.9
160 0.13 13.5 16.8 8.8 8.1 581 627 513 502 8.8 9.5 7.8 7.6
220 0.20 20.3 25.0 13.7 11.9 811 887 702 673 9.0 9.8 7.8 7.4
270 0.20 27.2 33.4 18.7 16.1 1414 1561 1209 1146 12.7 14.1 10.9 10.3

100 mK

A1

Band Center [GHz] Frac BW Tsky (Atacama) [K] Tsky (Pole) [K] Tsky (Atacama, Paine) [K] Tsky (Pole, Paine) [K] NET (Atacama)
[μK sqrt(s)]
NET (Pole)
[μK sqrt(s)]
NET (Atacama, Paine)
[μK sqrt(s)]
NET (Pole, Paine)
[μK sqrt(s)]
NETarr (Atacama)
[μK sqrt(s)]
NETarr (Pole)
[μK sqrt(s)]
NETarr (Atacama, Paine)
[μK sqrt(s)]
NETarr (Pole, Paine)
[μK sqrt(s)]
21 0.25 5.8 6.2 5.1 4.9 354 359 344 342 41.0 41.7 39.9 39.6
29 0.25 5.4 6.7 4.6 5.8 306 322 295 311 25.7 27.0 24.8 26.1
40 0.25 9.5 13.2 8.1 12.0 316 356 302 344 19.3 21.7 18.4 20.9
87 0.15 10.7 14.9 8.2 11.9 367 414 339 381 10.3 11.6 9.5 10.7
102 0.15 10.7 14.9 7.9 11.1 373 419 341 378 8.9 10.0 8.1 9.0
140 0.13 10.9 14.0 7.2 8.1 455 495 406 418 7.9 8.6 7.1 7.3
160 0.13 13.5 16.8 8.8 8.1 539 584 474 463 8.2 8.9 7.2 7.0
220 0.20 20.3 25.0 13.7 11.9 764 839 659 630 8.5 9.3 7.3 7.0
270 0.20 27.2 33.4 18.7 16.1 1345 1490 1144 1083 12.1 13.4 10.3 9.8

Config "A2"

A2 bandPlot.jpg

250 mK

Band Center [GHz] Frac BW Tsky (Atacama) [K] Tsky (Pole) [K] Tsky (Atacama, Paine) [K] Tsky (Pole, Paine) [K] NET (Atacama)
[μK sqrt(s)]
NET (Pole)
[μK sqrt(s)]
NET (Atacama, Paine)
[μK sqrt(s)]
NET (Pole, Paine)
[μK sqrt(s)]
NETarr (Atacama)
[μK sqrt(s)]
NETarr (Pole)
[μK sqrt(s)]
NETarr (Atacama, Paine)
[μK sqrt(s)]
NETarr (Pole, Paine)
[μK sqrt(s)]
25 0.25 5.8 6.5 5.0 5.3 377 387 366 371 36.7 37.7 35.7 36.1
34 0.25 6.4 8.4 5.4 7.5 341 365 329 353 24.4 26.1 23.6 25.3
87 0.25 11.4 15.9 8.9 12.9 319 359 296 332 8.9 10.0 8.3 9.3
102 0.30 17.7 25.0 14.2 20.8 345 402 317 370 8.2 9.6 7.6 8.8
140 0.25 13.1 17.5 9.2 11.4 376 418 339 361 6.5 7.3 5.9 6.3
160 0.20 15.0 18.6 10.1 8.9 485 526 429 415 7.4 8.0 6.5 6.3
245 0.20 23.2 28.6 15.8 14.0 1054 1157 909 871 10.5 11.5 9.0 8.7

100 mK

A2

Band Center [GHz] Frac BW Tsky (Atacama) [K] Tsky (Pole) [K] Tsky (Atacama, Paine) [K] Tsky (Pole, Paine) [K] NET (Atacama)
[μK sqrt(s)]
NET (Pole)
[μK sqrt(s)]
NET (Atacama, Paine)
[μK sqrt(s)]
NET (Pole, Paine)
[μK sqrt(s)]
NETarr (Atacama)
[μK sqrt(s)]
NETarr (Pole)
[μK sqrt(s)]
NETarr (Atacama, Paine)
[μK sqrt(s)]
NETarr (Pole, Paine)
[μK sqrt(s)]
25 0.25 5.8 6.5 5.0 5.3 329 339 319 323 32.1 33.0 31.1 31.5
34 0.25 6.4 8.4 5.4 7.5 300 323 289 312 21.5 23.1 20.7 22.3
87 0.25 11.4 15.9 8.9 12.9 290 329 268 303 8.1 9.2 7.5 8.5
102 0.30 17.7 25.0 14.2 20.8 318 374 291 342 7.6 8.9 7.0 8.2
140 0.25 13.1 17.5 9.2 11.4 348 389 312 333 6.1 6.8 5.4 5.8
160 0.20 15.0 18.6 10.1 8.9 451 492 397 383 6.9 7.5 6.0 5.8
245 0.20 23.2 28.6 15.8 14.0 998 1099 856 819 9.9 10.9 8.5 8.1


Config "B"

B bandPlot.jpg

250 mK

Band Center [GHz] Frac BW Tsky (Atacama) [K] Tsky (Pole) [K] Tsky (Atacama, Paine) [K] Tsky (Pole, Paine) [K] NET (Atacama)
[μK sqrt(s)]
NET (Pole)
[μK sqrt(s)]
NET (Atacama, Paine)
[μK sqrt(s)]
NET (Pole, Paine)
[μK sqrt(s)]
NETarr (Atacama)
[μK sqrt(s)]
NETarr (Pole)
[μK sqrt(s)]
NETarr (Atacama, Paine)
[μK sqrt(s)]
NETarr (Pole, Paine)
[μK sqrt(s)]
21 0.25 5.8 6.2 5.1 4.9 406 412 396 393 47.0 47.7 45.9 45.6
29 0.25 5.4 6.7 4.6 5.8 350 366 339 355 29.4 30.8 28.4 29.8
40 0.25 9.5 13.2 8.1 12.0 355 396 341 383 21.6 24.1 20.7 23.3
95 0.30 10.6 14.7 7.9 11.3 286 319 264 292 7.3 8.2 6.8 7.5
150 0.25 12.0 15.2 7.9 7.9 383 414 341 342 6.2 6.7 5.5 5.6
220 0.20 20.3 25.0 13.7 11.9 811 887 702 673 9.0 9.8 7.8 7.4
270 0.20 27.2 33.4 18.7 16.1 1414 1561 1209 1146 12.7 14.1 10.9 10.3

100 mK

B

Band Center [GHz] Frac BW Tsky (Atacama) [K] Tsky (Pole) [K] Tsky (Atacama, Paine) [K] Tsky (Pole, Paine) [K] NET (Atacama)
[μK sqrt(s)]
NET (Pole)
[μK sqrt(s)]
NET (Atacama, Paine)
[μK sqrt(s)]
NET (Pole, Paine)
[μK sqrt(s)]
NETarr (Atacama)
[μK sqrt(s)]
NETarr (Pole)
[μK sqrt(s)]
NETarr (Atacama, Paine)
[μK sqrt(s)]
NETarr (Pole, Paine)
[μK sqrt(s)]
21 0.25 5.8 6.2 5.1 4.9 354 359 344 342 41.0 41.7 39.9 39.6
29 0.25 5.4 6.7 4.6 5.8 306 322 295 311 25.7 27.0 24.8 26.1
40 0.25 9.5 13.2 8.1 12.0 316 356 302 344 19.3 21.7 18.4 20.9
95 0.30 10.6 14.7 7.9 11.3 260 292 239 266 6.7 7.5 6.1 6.8
150 0.25 12.0 15.2 7.9 7.9 355 385 314 315 5.8 6.2 5.1 5.1
220 0.20 20.3 25.0 13.7 11.9 764 839 659 630 8.5 9.3 7.3 7.0
270 0.20 27.2 33.4 18.7 16.1 1345 1490 1144 1083 12.1 13.4 10.3 9.8

"Jones" Config

Jones bandPlot.jpg

250 mK

Band Center [GHz] Frac BW Tsky (Atacama) [K] Tsky (Pole) [K] Tsky (Atacama, Paine) [K] Tsky (Pole, Paine) [K] NET (Atacama)
[μK sqrt(s)]
NET (Pole)
[μK sqrt(s)]
NET (Atacama, Paine)
[μK sqrt(s)]
NET (Pole, Paine)
[μK sqrt(s)]
NETarr (Atacama)
[μK sqrt(s)]
NETarr (Pole)
[μK sqrt(s)]
NETarr (Atacama, Paine)
[μK sqrt(s)]
NETarr (Pole, Paine)
[μK sqrt(s)]
9 0.33 3.6 4.0 3.3 3.8 480 488 474 484 129.7 132.0 128.3 130.9
16 0.25 4.0 4.5 3.5 4.1 427 437 419 429 65.0 66.5 63.8 65.3
25 0.20 5.7 6.5 4.9 5.3 420 432 407 414 40.9 42.0 39.7 40.3
35 0.14 6.7 8.8 5.6 7.8 454 488 438 472 31.6 33.9 30.5 32.8

100 mK

Band Center [GHz] Frac BW Tsky (Atacama) [K] Tsky (Pole) [K] Tsky (Atacama, Paine) [K] Tsky (Pole, Paine) [K] NET (Atacama)
[μK sqrt(s)]
NET (Pole)
[μK sqrt(s)]
NET (Atacama, Paine)
[μK sqrt(s)]
NET (Pole, Paine)
[μK sqrt(s)]
NETarr (Atacama)
[μK sqrt(s)]
NETarr (Pole)
[μK sqrt(s)]
NETarr (Atacama, Paine)
[μK sqrt(s)]
NETarr (Pole, Paine)
[μK sqrt(s)]
9 0.33 3.6 4.0 3.3 3.8 410 418 405 414 111.1 113.2 109.7 112.1
16 0.25 4.0 4.5 3.5 4.1 368 377 361 370 56.0 57.4 54.9 56.4
25 0.20 5.7 6.5 4.9 5.3 367 378 355 361 35.7 36.8 34.6 35.2
35 0.14 6.7 8.8 5.6 7.8 401 433 385 418 27.9 30.1 26.8 29.1