IBIC2026 - 15th International Beam Instrumentation Conference

Development of In-Air X-ray Detector for vertical beam size measurement at SESAME

MOP049

31 Aug 2026, 16:40

2h

Ballroom C (Whistler Conference Centre)

Poster Presentation MC04: Transverse Profile and Emittance Monitors Monday Poster Session 1

Speaker

Hussein Al-Mohammad (Synchrotron-Light for Experimental Science and Applications in the Middle East)

Description

An In-Air X-ray Detector (IAXD) was designed and installed at the SESAME storage ring (SR) dipole exit in order to use the photon X-ray part coming out of the dipole photon absorber. The IAXD uses a scintillator placed directly downstream the absorber, converting transmitted X-rays into visible light. Two types of scintillation screens, CdWO₄ and GOS:Tb, were used and compared over a range of exposure times up to 8 seconds. Given the vertical divergence of 86 keV photons and the distance between the source point and the scintillator, it is possible to accurately calculate the vertical beam size at the source point. This paper presents the measurement results obtained with the IAXD and evaluates its feasibility as a complementary diagnostic tool in the 2.5 GeV storage ring.