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Title: Tuner of a Second Harmonic Cavity of the Fermilab Booster

Abstract

Introducing a second harmonic cavity in the accelerating system of the Fermilab Booster promises significant reduc-tion of the particle beam loss during the injection, transi-tion, and extraction stages. To follow the changing energy of the beam during acceleration cycles, the cavity is equipped with a tuner that employs perpendicularly biased AL800 garnet material as the frequency tuning media. The required tuning range of the cavity is from 75.73 MHz at injection to 105.64 MHz at extraction. This large range ne-cessitates the use of a relatively low bias magnetic field at injection, which could lead to high RF loss power density in the garnet, or a strong bias magnetic field at extraction, which could result in high power consumption in the tuner’s bias magnet. The required 15 Hz repetition rate of the device and high sensitivity of the local RF power loss to the level of the magnetic field added to the challenges of the bias system design. In this report, the main features of a proposed prototype of the second harmonic cavity tuner are presented.

Authors:
ORCiD logo [1];  [1];  [1];  [1];  [1];  [1];  [1]
  1. Fermilab
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
PIP
OSTI Identifier:
1366525
Report Number(s):
FERMILAB-CONF-17-164-TD; IPAC-2017-THPIK113
1607164
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Conference
Resource Relation:
Conference: 8th International Particle Accelerator Conference, Copenhagen, Denmark, 05/14-05/19/2017
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Terechkine, I., Duel, K., Madrak, R., Makarov, A., Romanov, G., Sun, D., and Tan, C.-Y. Tuner of a Second Harmonic Cavity of the Fermilab Booster. United States: N. p., 2015. Web.
Terechkine, I., Duel, K., Madrak, R., Makarov, A., Romanov, G., Sun, D., & Tan, C.-Y. Tuner of a Second Harmonic Cavity of the Fermilab Booster. United States.
Terechkine, I., Duel, K., Madrak, R., Makarov, A., Romanov, G., Sun, D., and Tan, C.-Y. Sun . "Tuner of a Second Harmonic Cavity of the Fermilab Booster". United States. https://www.osti.gov/servlets/purl/1366525.
@article{osti_1366525,
title = {Tuner of a Second Harmonic Cavity of the Fermilab Booster},
author = {Terechkine, I. and Duel, K. and Madrak, R. and Makarov, A. and Romanov, G. and Sun, D. and Tan, C.-Y.},
abstractNote = {Introducing a second harmonic cavity in the accelerating system of the Fermilab Booster promises significant reduc-tion of the particle beam loss during the injection, transi-tion, and extraction stages. To follow the changing energy of the beam during acceleration cycles, the cavity is equipped with a tuner that employs perpendicularly biased AL800 garnet material as the frequency tuning media. The required tuning range of the cavity is from 75.73 MHz at injection to 105.64 MHz at extraction. This large range ne-cessitates the use of a relatively low bias magnetic field at injection, which could lead to high RF loss power density in the garnet, or a strong bias magnetic field at extraction, which could result in high power consumption in the tuner’s bias magnet. The required 15 Hz repetition rate of the device and high sensitivity of the local RF power loss to the level of the magnetic field added to the challenges of the bias system design. In this report, the main features of a proposed prototype of the second harmonic cavity tuner are presented.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2015},
month = {5}
}

Conference:
Other availability
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