Abstract
The Spallation Neutron Source (SNS) injection system transports a chopped, 1ms H-ion beam from the linac into the accumulator ring, where two electrons are stripped from each ion, resulting in a proton beam propagating in the ring. The injection kickers use a 1400A current source with a 1ms discharge time to paint the optimum phase space of the injected proton population. The accumulation ring stacks 1us bunches from the 1ms beam pulse to increase peak beam current by a factor of 1000. The accumulated beam is deflected by fourteen 33kV, 700ns pulsed extraction kicker magnets and delivered to the mercury target, where neutrons are spalled for science experiments. Protecting the accelerator from an errant beam-which may result from asynchronous firing or insufficient magnetic-field intensity in kicker systems-requires a system that monitors and verifies the pulsed current in the kicker magnets prior to and during each 60Hz beam pulse. In addition, the extraction system pulse-forming network (PFN) is verified to be correctly charged and ready for triggering prior to injecting the beam into the linac from the ion source. This paper describes the two verification systems requirements, limitations of the existing systems, and development of new systems.
| Original language | English |
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| Title of host publication | 2019 IEEE Pulsed Power and Plasma Science, PPPS 2019 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| ISBN (Electronic) | 9781538679692 |
| DOIs | |
| State | Published - Jun 2019 |
| Event | 2019 IEEE Pulsed Power and Plasma Science, PPPS 2019 - Orlando, United States Duration: Jun 23 2019 → Jun 29 2019 |
Publication series
| Name | IEEE International Pulsed Power Conference |
|---|---|
| Volume | 2019-June |
| ISSN (Print) | 2158-4915 |
| ISSN (Electronic) | 2158-4923 |
Conference
| Conference | 2019 IEEE Pulsed Power and Plasma Science, PPPS 2019 |
|---|---|
| Country/Territory | United States |
| City | Orlando |
| Period | 06/23/19 → 06/29/19 |
Funding
∗ This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan). ξemail: [email protected] Figure 2. Masked current waveforms from four injection kicker current readbacks, 150A/V, 1ms/div.