| Full text | |
| Author(s): |
Saramela, Thiago B.
;
Silva, Tiago F.
;
Bregant, Marco
;
Munhoz, Marcelo G.
;
Quach, Tien T.
;
Hague, Richard
;
Gilmore, Ian S.
;
Roberts, Clive J.
;
Trindade, Gustavo F.
Total Authors: 9
|
| Document type: | Journal article |
| Source: | NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SP; v. 1066, p. 7-pg., 2024-07-16. |
| Abstract | |
Research on aging processes of Gas Electron Multipliers (GEMs) is important to obtain insights on how to increase the detector's longevity, stability, and performance, as highlighted in the latest developments roadmap by the European Council of Future Accelerators (ECFA). One key aspect of the aging process is the deposit formation on the electrodes surfaces. In this work, through the analysis of the molecular content on the surface of a used GEM, we provide evidence for polyimide redeposition as a source of organic material contributing to the formation of insulating layers on the electrodes, which eventually lead to sparks and detector failure. Furthermore, we show that chromium, used to promote adhesion between copper and polyimide, in the device undergoes a diffusion process, effectively blurring the layered structure. We demonstrate the significance of surface-sensitive chemical analysis to investigate the surface deposits on electrodes of gaseous detectors and our results reveal the necessity of standardization and more stringent study protocols. (AU) | |
| FAPESP's process: | 19/07426-0 - 3D printing of micro-patterned gaseous detectors: a route for sensor adaptability and optimisation |
| Grantee: | Tiago Fiorini da Silva |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 20/04867-2 - High energy physics and instrumentation with the LHC-CERN |
| Grantee: | Marcelo Gameiro Munhoz |
| Support Opportunities: | Special Projects |
| FAPESP's process: | 22/03043-1 - Micro-patterned gaseous detectors of radiation and its applications |
| Grantee: | Tiago Fiorini da Silva |
| Support Opportunities: | Research Grants - Initial Project |