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Message ID: 15567     Entry time: Thu Sep 10 15:43:22 2020
Author: Jon 
Type: Update 
Category: BHD 
Subject: Input noise spectra for A+ BHD modeling 

As promised some time ago, I've obtained input noise spectra from the sites calibrated to physical units. They are located in a new subdirectory of the BHD repo: A+/input_noises. I've heavily annotated the notebook that generates them (input_noises.ipynb) with aLOG references, to make it transparent what filters, calibrations, etc. were applied and when the data were taken. Each noise term is stored as a separate HDF5 file, which are all tracked via git LFS.

So far there are measurements of the following sources:

  • L1 SRCL
  • H1 SRCL
  • L1 DHARD PIT
  • L1 DSOFT PIT
  • L1 CSOFT PIT
  • L1 CHARD PIT

These can be used, for example, to make more realistic Hang's bilinear noise modeling [ELOG 15503] and Yehonathan's Monte Carlo simulations [ELOG 15539]. Let me know if there are other specific noises of interest and I will try to acquire them. It's a bit time-consuming to search out individual channel calibrations, so I will have to add them on a case-by-case basis.

ELOG V3.1.3-