ISC RFPD Resonant Circuit Optimizer Code

Document #:

LIGO-T1400196-v1

Document type:

T - Technical notes

Abstract:

A set of Matlab .m files used to find optimal values for the aLIGO RFPDs. The code (written by Rana) returns the top 5 solutions that yield maximum SNR as defined by a weighted cost function. The file descriptions are as follows:

snrfind2.m - This is the main optimizer code. Set operating frequency and number of iterations.

pdsnr2.m - Set operating frequencies, opamp noise, analysis temperature, and cost function weighting parameters.

pdz.m - Called to calculate the RFPD transimpedance and "back" impedance as "seen" looking out the RF opamp positive input.

Files in Document:

• Zipped Matlab Files (RFPD_Optimizer_v1.zip, file is not accessible)

Topics:

• Final Design
• Sensing and Control

Authors:

• Rich Abbott
• Rana Adhikari
• Peter Fritschel

Keywords:

optimizer matlab

Referenced by:

• LIGO-E1400110: ISC RF Photodetector Design Documentation