Abstract
The imaging properties of cascaded-GEM (Gas Electron Multiplier) and cascaded-GEM/MHSP (Micro-Hole and Strip Plate) gaseous electron multipliers, equipped with 2-DWedge & Strip (W&S) readout electrodes, are presented. The W&S electrode was capacitivelycoupled to the electron multiplier through a resistive electrode, to adapt the charge-cloud size tothe 1.6 mm readout pitch. The studies were carried out with soft X-rays and single UV-photonsin Ar/5%CH4 gas mixture at atmospheric pressure. Spatial resolutions of ∼225μm and ∼250μm(FWHM) were reached, with 5.9 keV X-rays, in 3-GEM and 2-GEM/MHSP based detectors,respectively. Single photoelectrons, emitted from a CsI photocathode deposited on the topelectrode of the first GEM in the cascade, were localized with resolution of ∼ 170μm (FWHM)in a 4-GEM gaseous photomultiplier.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
