Detector with Adjustable Aperture for Electron Beam Monitoring
- Applied Diamond, Inc
Recently new high energy electron cooling beam projects, CeC and LEReC, were proposed at Brookhaven National Laboratory (BNL) as parts of a future electron-ion collider (EIC) and Relativistic Heavy Ion Collider (RHIC), respectively. Both projects are based on new principles and aimed at the improvement of luminosity for EIC and RHIC operations. Efficient electron cooling requires high quality high power electron beam with tight parameters (energy and space trajectory). In order to achieve and maintain the required parameters and stability of electron beam, its parameters has to be continuously monitored and control feedbacks has to be developed. However, existing beam detectors are not suitable for invasive profile measurements of powerful continuous wave (CW) electron beams, for example, they cannot survive the direct impact of many kW power CW electron beams causing the temperature increase by several hundred degrees. As result, currently, the beam profile of powerful CW electron beams is monitored in the low repetition pulsed mode and assumed to remain the same in the CW mode. The purpose of the project was to research and develop an invasive solid state diamond detector with adjustable aperture to measure simultaneously the 2D halo and beam core profiles of high intensity CW electron beams, such as electron cooling beams and FEL beams. The impact of this project is dependent on the unique properties of diamond: low energy absorption, tremendous radiation tolerance, ability to dissipate significant heat load, and stability of electronic properties over a wide temperature range. This diamond multi-strip detector should have a fast time response, high radiation stability, low beam line impedance interference and long life-time compared to existing beam-halo profile detectors. In Phase I we developed and fabricated the first prototype of fast scanning diamond beam profile detector (DBPD) suitable for invasive high power CW electron beam core profile measurements in transmittance mode. The research and development of the first prototype in significant degree was focused on the future installation into high power CeC and LEReC beam-lines at BNL, and the detector design was tailored to the corresponding BNL requirements. The developed DBPD prototype was successfully tested at the experimental ATF/BNL electron beam demonstrating that the DBPD prototype is able to detect a single 20 ps pulse of electrons. Numerical modeling demonstrated that the DBPD prototype is suitable for direct core beam profile measurements of the powerful CW mode CeC beamline. The DBPD prototype has been installed into the CeC beamline and scheduled for testing in March 2021. The potential application of the DBPD include beam profile monitoring of CW CeC and LEReC beamlines at BNL, as well as of powerful CW Free Electron Laser (FEL) beams, such as CEBAF at JLAB C and LCLS-II at SLAC.
- Research Organization:
- Applied Diamond, Inc
- Sponsoring Organization:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- Contributing Organization:
- Brookhaven National Laboratory
- DOE Contract Number:
- SC0020498
- OSTI ID:
- 1829729
- Type / Phase:
- SBIR (Phase I)
- Report Number(s):
- DE-SC0020498
- Country of Publication:
- United States
- Language:
- English
Similar Records
High-energy high-luminosity electron-ion collider eRHIC
R&D ERL: Beam dynamics, parameters, and physics to be learned