A new Slow Control and Run Initialization Byte-wise Environment (SCRIBE) for the quality control of mass-produced CMS GEM detectors

TL;DR

SCRIBE is a scalable, web-based system that standardizes and accelerates quality control measurements for CMS GEM detectors, enabling near real-time analysis and response uniformity assessment across multiple production sites.

Contribution

It introduces SCRIBE, a novel framework that simplifies and standardizes GEM chamber quality control, significantly increasing data acquisition rates and enabling real-time feedback.

Findings

Successful deployment on mass-produced CMS GEM chambers

Achieved 5 kHz data acquisition rate for chambers with 3072 strips

Provided near real-time response analysis and uniformity assessment

Abstract

The CMS collaboration aims at improving the muon trigger and tracking performance at the HL-LHC by installing new Gas Electron Multiplier (GEM) chambers in the endcaps of the CMS experiment. Construction and commissioning of GEM chambers for the first muon endcap stations is ramping up in several laboratories using common quality control protocols. The SCRIBE framework is a scalable and cross-platform webbased application for the RD51 Scalable Readout System (SRS) that controls data acquisition and analyzes data in near real time. It has been developed mainly to simplify and standardize measurements of the GEM chamber response uniformities with x-rays across all production sites. SCRIBE works with zero suppression of raw SRS pulse height data. This has increased acquisition rates to 5 kHz for a CMS GEM chamber with 3072 strips and allows strip-by-strip response comparisons with a few hours of data taking. SCRIBE also manages parallel data reconstruction to provide near real-time feedback on the chamber response to the user. Preliminary results on the response performance of the first mass-produced CMS GEM chambers commissioned with SCRIBE are presented.