A# Profile optimization update for 01/28/2026 group meeting.

Slides updating progress on FROSTI A# irradiance profiles and reflector design. Edge roll-off is now included for thermoelastic deformation corrections.

Vacuum Pressure Warning Script

Script Location: controls@chimay

Script Path: /vac/python/serial/temp_vacuum_warning.py

Purpose

Implement an automated warning system that monitors vacuum pressure and sends email alerts when pressure thresholds are exceeded.

Implementation Details

• The script runs launcher.py (located in the same directory) every 30 minutes to retrieve the latest vacuum pressure reading.
• If the pressure rises above the critical threshold (≥ 1 × 10^-6 Torr), an email alert will be sent to all group members.
• If the pressure rises above the warning threshold (≥ 1 × 10^-7 Torr), an email alert will be sent to Xuesi Ma.
• If launcher.py fails to retrieve the vacuum pressure, or if any execution error occurs, an error notification email will be sent to Xuesi Ma.

How to Run

python temp_vacuum_warning.py

Note

An app password is required for authentication in order to send alert emails.

Slides covering a new approach to optimizing for A# FROSTI profiles. In particular, we start looking at just optimal RH correction. Once this profile is determined, we then minimize the residual further with FROSTI profiles.

Slides discussing updates on FROSTI A# profile optimizations. In particular, a new RMS function is defined which reduces inner-radii wavefront error variation to a greater degree.

Slides discussing SURF, OPD, and SURF+OPD optimizations for idealized FROSTI A# profiles.

Slides discussing for A# Ring Heater design.

Slides discussing including overlapped irradiance profiles at the center of an A# ITM.

Weight Calibration: this study looks at how the thermal-compensation system should be tuned as the laser beam moves off-center on a detector mirror, with a fixed point-absorber defect in place. The optimizer that sets the actuator powers tries to flatten the wavefront, and it balances two kinds of distortion( i.e. surface distortion against substrate optical-path distortion) by a ratio that had been fixed at 20:1, but that value was only validated for a centered beam. So here I sweeps this ratio across beam positions from 0–5 cm along +x, with and without the absorber, re-optimizing the actuator powers at each position and judging each choice by the resulting power recycling gain from the fully locked interferometer.

Slides