GET_INvolved Portugal: R3B experimental setup built in LIP Coimbra tested at GSI at FAIR Phase 0


A new RPC-based detector built at LIP Coimbra is now part of the R3B experimental setup at the GSI. Students from the LIP NUC-RIA group are participating in the beam tests and in the preparation of upcoming experiments" GET_INvolved Programme supported students and researchers who participated in FAIR PHASE 0 experiments at R3B.

A new RPC (Resistive Plate Chamber) detector built at the LIP Detectors Lab in Coimbra is now included in the experimental setup of the R3B (Reactions with Relativistic Radioactive Beams) experiment at the GSI/FAIR laboratory in Darmstadt, Germany. The detector is located after the superconducting magnet GLAD, and will measure the momentum of protons produced in reactions with radioactive beams using the Time-of-Flight technique. The excellent timing of the detector (about 50 ps) will allow for a very precise momentum measurement.

The detector was installed at the R3B experimental setup (see picture) and took part on the tests performed by the collaboration in March. The detector measured protons coming from nuclear reactions, and was also exposed to a direct beam of 12C nuclei for calibration purposes. In the picture the various spots where the beam hit the detector during the measurement can be observed. The vertical axis shows the strip number, which is representative of the vertical component of the detector.

R3B at FAIR Phase 0
In the first experiment where it will be used (experiment S522) the new detector will contribute to measuring for the first time Short Range Correlations of nucleons inside a radioactive nucleus. The installation and operation of the detector are done by LIP scientists from Coimbra and Lisbon. The work is part of the PhD thesis of Manuel Xarepe (in the picture) who is in Darmstadt since November 2021. Another student in the group, Tomás Sousa, participated in the commissioning and calibration of another of the main detectors of the R3B, the CALIFA electromagnetic calorimeter. The work in this test beam time, as well as for the execution of the experiments in this year’s campaign, constitute the main part of his master thesis in Engineering Physics.

Both students are presently still at the GSI through GET_INvolved Programme.

Wondering what is R3B?
The R3B (Reactions with Relativistic Radioactive Beams) setup at FAIR will serve the investigation of nuclear reactions with exotic nuclei far from stability. In this approach the nuclei typically have velocities of several 10th of the speed of light. Due to the expected low production rates of the most exotic nuclei that can be reached, a high efficiency is necessary in this experiment. Reaction products, that is particles like protons and neutrons, as well as gamma radiation, will be detected as exhaustive as possible by a complex detector system.

About LIP, Coimbra
LIP, Laboratory of Instrumentation and Experimental Particle Physics, is the reference institution for experimental particle physics and associated technologies in Portugal.

GET_INvolved Prorgamme
Would you like to participate in GET_INvolved Programme? #ApplyNow

Speculative applications:

Text adapted from the oirginal News: News was first published by Laboratório de Instrumentação e Física Experimental de Partículas, Lisbon Portugal