Low-Energy Cooling for Electron Ion Collider

Benson, Stephen; Bruker, Max; Fedotov, A.; Gu, X.; Gulliford, Colwyn; Guo, Jiquan; Hutton, A.; Kewisch, J.; Kayran, D.; Ptitsyn, V.; Rimmer, Robert; Satogata, T.; Seletskiy, Sergei; Seryi, Andrei; Wang, E.; Wang, H.; H., Zhang,; Zhang, Y.; Zhao, He

doi:10.2172/1749902

Cited by 2 publications

(1 citation statement)

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“…Once the FC72 flow was implemented through the cooling channel, the cathode temperature dropped to 15 • C. In principle, the K 2 CsSb photocathode can survive at this temperature when 100 mA of average current is being generated, with laser power less than 10 Watts if the QE is above 2.3% [32]. Therefore, this cathode cooling setup can be applied in any high brightness high current electron source to be used for future scientific user facilities, such as electron cooling or energy recovery Linac based light sources [33][34][35].…”

Section: Cathode Heat Transfermentioning

confidence: 99%

High voltage DC gun for high intensity polarized electron source

Wang,

Rahman,

Skaritka

et al. 2021

Preprint

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The high intensity polarized electron source is a critical component for future nuclear physics facilities. The Electron Ion Collider (EIC) requires a polarized electron gun with higher voltage and higher bunch charge compared to any existing polarized electron source. At Brookhaven National Laboratory, we have built an inverted high voltage direct current (HVDC) photoemission gun with a large cathode size. We report on the performances of GaAs photocathodes in a high gradient with up to a 16 nC bunch charge. The measurements were performed at a stable operating gap voltage of 300 kV -demonstrating outstanding lifetime, and robustness. We observed obvious lifetime enhancement by biasing the anode. The gun also integrated a cathode cooling system for potential application on high current electron sources. The various novel features implemented and demonstrated in this polarized HVDC gun open the door towards future high intensity-high average current electron accelerator facilities.

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