Thyratron stability improvements of SNS extraction kicker system

B. Morris; R. Saethre

doi:10.1109/IPMHVC.2016.8012902

Thyratron stability improvements of SNS extraction kicker system

B. Morris, R. Saethre

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

3 Scopus citations

Abstract

The Spallation Neutron Source (SNS) extraction kicker system is a high power 60Hz pulsed system used to eject a proton beam from the accumulator ring and transfer it to the mercury target. The system consists of 14 Blumlein pulse forming network (PFN) modulators that require precise timing synchronization and fast rise times. Timing jitter can result in a modulator potentially firing outside of the ideal extraction time and causing excessive beam loss. A commercial thyratron is used as the high voltage switching element in the PFN. Adjustments to the reservoir and filament heater power are used to stabilize firing times as the thyratron ages but this can reduce the lifetime of the thyratrons that are used to switch the PFN. This paper discusses the thyratron system itself, focusing on the control of the filaments and reservoir heater power sources to eliminate line sync issues and further stabilize the grid to extend lifetime in new and aging thyratrons and the results of the improvements made.

Original language	English
Title of host publication	2016 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2016
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	84-87
Number of pages	4
ISBN (Electronic)	9781509023547
DOIs	https://doi.org/10.1109/IPMHVC.2016.8012902
State	Published - Aug 17 2017
Externally published	Yes
Event	2016 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2016 - San Francisco, United States Duration: Jul 5 2016 → Jul 9 2016

Publication series

Name	2016 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2016

Conference

Conference	2016 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2016
Country/Territory	United States
City	San Francisco
Period	07/5/16 → 07/9/16

Funding

ORNL is managed by UT-Battelle, LLC, under contract DE-AC05-00OR22725 for the U.S. Department of Energy. This research was supported by the DOE Office of Science, Basic Energy Science, Scientific User Facilities.

Funders	Funder number
U.S. Department of Energy
Office of Science
Basic Energy Sciences
Oak Ridge National Laboratory	DE-AC05-00OR22725

Keywords

Spallation
Thryatron

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1109/IPMHVC.2016.8012902

Cite this

Morris, B., & Saethre, R. (2017). Thyratron stability improvements of SNS extraction kicker system. In 2016 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2016 (pp. 84-87). Article 8012902 (2016 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2016). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/IPMHVC.2016.8012902

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title = "Thyratron stability improvements of SNS extraction kicker system",

abstract = "The Spallation Neutron Source (SNS) extraction kicker system is a high power 60Hz pulsed system used to eject a proton beam from the accumulator ring and transfer it to the mercury target. The system consists of 14 Blumlein pulse forming network (PFN) modulators that require precise timing synchronization and fast rise times. Timing jitter can result in a modulator potentially firing outside of the ideal extraction time and causing excessive beam loss. A commercial thyratron is used as the high voltage switching element in the PFN. Adjustments to the reservoir and filament heater power are used to stabilize firing times as the thyratron ages but this can reduce the lifetime of the thyratrons that are used to switch the PFN. This paper discusses the thyratron system itself, focusing on the control of the filaments and reservoir heater power sources to eliminate line sync issues and further stabilize the grid to extend lifetime in new and aging thyratrons and the results of the improvements made.",

keywords = "Spallation, Thryatron",

author = "B. Morris and R. Saethre",

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year = "2017",

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doi = "10.1109/IPMHVC.2016.8012902",

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series = "2016 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2016",

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Morris, B & Saethre, R 2017, Thyratron stability improvements of SNS extraction kicker system. in 2016 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2016., 8012902, 2016 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2016, Institute of Electrical and Electronics Engineers Inc., pp. 84-87, 2016 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2016, San Francisco, United States, 07/5/16. https://doi.org/10.1109/IPMHVC.2016.8012902

Thyratron stability improvements of SNS extraction kicker system. / Morris, B.; Saethre, R.
2016 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2016. Institute of Electrical and Electronics Engineers Inc., 2017. p. 84-87 8012902 (2016 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2016).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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N2 - The Spallation Neutron Source (SNS) extraction kicker system is a high power 60Hz pulsed system used to eject a proton beam from the accumulator ring and transfer it to the mercury target. The system consists of 14 Blumlein pulse forming network (PFN) modulators that require precise timing synchronization and fast rise times. Timing jitter can result in a modulator potentially firing outside of the ideal extraction time and causing excessive beam loss. A commercial thyratron is used as the high voltage switching element in the PFN. Adjustments to the reservoir and filament heater power are used to stabilize firing times as the thyratron ages but this can reduce the lifetime of the thyratrons that are used to switch the PFN. This paper discusses the thyratron system itself, focusing on the control of the filaments and reservoir heater power sources to eliminate line sync issues and further stabilize the grid to extend lifetime in new and aging thyratrons and the results of the improvements made.

AB - The Spallation Neutron Source (SNS) extraction kicker system is a high power 60Hz pulsed system used to eject a proton beam from the accumulator ring and transfer it to the mercury target. The system consists of 14 Blumlein pulse forming network (PFN) modulators that require precise timing synchronization and fast rise times. Timing jitter can result in a modulator potentially firing outside of the ideal extraction time and causing excessive beam loss. A commercial thyratron is used as the high voltage switching element in the PFN. Adjustments to the reservoir and filament heater power are used to stabilize firing times as the thyratron ages but this can reduce the lifetime of the thyratrons that are used to switch the PFN. This paper discusses the thyratron system itself, focusing on the control of the filaments and reservoir heater power sources to eliminate line sync issues and further stabilize the grid to extend lifetime in new and aging thyratrons and the results of the improvements made.

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Thyratron stability improvements of SNS extraction kicker system

Abstract

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Keywords

UN SDGs

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