Injection Beam Loss Monitor for NSLS-II Radiation Protection
- Brookhaven National Lab. (BNL), Upton, NY (United States)
The NSLS-II with its high stored beam energy operation and top-off injection, make the radiation protection a critical issue. The radiation shield wall of the tunnel is being designed to be adequate for a 10% loss of the injection current (l.4nC/min) at any one location. The injection region is shielded for 100% injection losses (14nC/min). This thinner shielding around the ring is a concern should the beam develop high current instabilities, that would cause the beam to dump or develop a very short lifetime. In order to overcome these instabilities, studies and operations in the high current conditions that might drive these instabilities would be required. If the radiation shielding would not allow operation at these currents, then the ability to study and correct these instabilities may not be allowed or at least not without greatly restriction the users access to the experimental floor. We propose a detector that could be used to quantify the amount of charge (DC current) lost around the ring, verifying that beam losses didn't exceed the design levels. This would then allow the beam to be refilled for operations and/or studies without regard to the experimental floor occupancy. In a earlier Tech Note we proposed a method to control the location of the beam dumped during intentional (interlock trips) and unintentional beam losses, this Tech Note will deal mostly with accounting for beam lost during injection.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- DOE Contract Number:
- SC0012704
- OSTI ID:
- 1480930
- Report Number(s):
- BNL--209379-2018-TECH; NSLSII-ASD-TN--055
- Country of Publication:
- United States
- Language:
- English
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