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Title: Design of 162-MHz CW Bunch-by-Bunch Chopper and Prototype Testing Results

Abstract

The PIP-II program of upgrades proposed for the Fermilab accelerator complex, is centered around a 800 MeV, 2 mA CW SRF linac. A unique feature of the PIP-II linac is the capability to form a flexible bunch structure by removing a pre-programmed set of bunches from a long-pulse or CW 162.5 MHz train, coming from the RFQ, within the 2.1-MeV Medium Energy Beam Transport (MEBT) section. The MEBT chopping system consists of two travelling-wave kickers working in sync followed by a beam absorber. The prototype components of the chopping system, two design variants of the kickers and a 1/4-size absorber, have been installed in the PIP-II Injector Test (PIP2IT) accelerator and successfully tested with beam of up to 5 mA. In part, one of the kickers demonstrated a capability to create an aperiodic pulse sequence suitable for synchronous injection into the Booster while operating at 500 V and average switching frequency of 44 MHz during 0.55 ms bursts at 20 Hz. This report presents the design of the PIP-II MEBT chopping system and results of prototypes testing at PIP2IT.

Authors:
ORCiD logo [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [1];  [1];  [1];  [1]; ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [1];  [1];  [3];  [1]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Michigan State Univ., East Lansing, MI (United States)
  3. Raja Ramanna Center for Advanced Technology (RRCAT) (India)
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)
OSTI Identifier:
1468406
Report Number(s):
FERMILAB-CONF-18-229-AD
1689697
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Conference
Resource Relation:
Conference: 61st ICFA Advanced Beam Dynamics Workshop on High-Intensity and High-Brightness Hadron Beams, Daejon (Korea, Rep. of), 17-22 Jun 2018
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Shemyakin, Alexander, Baffes, Curtis, Carneiro, Jean-Paul, Chase, Brian, Chen, Alex, Einstein-Curtis, Joshua, Frolov, Daniil, Hanna, Bruce, Lebedev, Valeri, Prost, Lionel, Richard, Christopher, Saewert, Gregory, Saini, Arun, Sharma, Dheeraj, and Sun, Ding. Design of 162-MHz CW Bunch-by-Bunch Chopper and Prototype Testing Results. United States: N. p., 2018. Web. doi:10.18429/JACoW-HB2018-THP1WC03.
Shemyakin, Alexander, Baffes, Curtis, Carneiro, Jean-Paul, Chase, Brian, Chen, Alex, Einstein-Curtis, Joshua, Frolov, Daniil, Hanna, Bruce, Lebedev, Valeri, Prost, Lionel, Richard, Christopher, Saewert, Gregory, Saini, Arun, Sharma, Dheeraj, & Sun, Ding. Design of 162-MHz CW Bunch-by-Bunch Chopper and Prototype Testing Results. United States. https://doi.org/10.18429/JACoW-HB2018-THP1WC03
Shemyakin, Alexander, Baffes, Curtis, Carneiro, Jean-Paul, Chase, Brian, Chen, Alex, Einstein-Curtis, Joshua, Frolov, Daniil, Hanna, Bruce, Lebedev, Valeri, Prost, Lionel, Richard, Christopher, Saewert, Gregory, Saini, Arun, Sharma, Dheeraj, and Sun, Ding. Sun . "Design of 162-MHz CW Bunch-by-Bunch Chopper and Prototype Testing Results". United States. https://doi.org/10.18429/JACoW-HB2018-THP1WC03. https://www.osti.gov/servlets/purl/1468406.
@article{osti_1468406,
title = {Design of 162-MHz CW Bunch-by-Bunch Chopper and Prototype Testing Results},
author = {Shemyakin, Alexander and Baffes, Curtis and Carneiro, Jean-Paul and Chase, Brian and Chen, Alex and Einstein-Curtis, Joshua and Frolov, Daniil and Hanna, Bruce and Lebedev, Valeri and Prost, Lionel and Richard, Christopher and Saewert, Gregory and Saini, Arun and Sharma, Dheeraj and Sun, Ding},
abstractNote = {The PIP-II program of upgrades proposed for the Fermilab accelerator complex, is centered around a 800 MeV, 2 mA CW SRF linac. A unique feature of the PIP-II linac is the capability to form a flexible bunch structure by removing a pre-programmed set of bunches from a long-pulse or CW 162.5 MHz train, coming from the RFQ, within the 2.1-MeV Medium Energy Beam Transport (MEBT) section. The MEBT chopping system consists of two travelling-wave kickers working in sync followed by a beam absorber. The prototype components of the chopping system, two design variants of the kickers and a 1/4-size absorber, have been installed in the PIP-II Injector Test (PIP2IT) accelerator and successfully tested with beam of up to 5 mA. In part, one of the kickers demonstrated a capability to create an aperiodic pulse sequence suitable for synchronous injection into the Booster while operating at 500 V and average switching frequency of 44 MHz during 0.55 ms bursts at 20 Hz. This report presents the design of the PIP-II MEBT chopping system and results of prototypes testing at PIP2IT.},
doi = {10.18429/JACoW-HB2018-THP1WC03},
url = {https://www.osti.gov/biblio/1468406}, journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {7}
}

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