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

doi:https://doi.org/10.18429/JACoW-HB2018-THP1WC03

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

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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:

^[1];

^[1]; Carneiro, Jean-Paul ^[1]; Chase, Brian ^[1];

^[1]; Einstein-Curtis, Joshua ^[1]; Frolov, Daniil ^[1]; Hanna, Bruce ^[1];

^[1];

^[1]; Richard, Christopher ^[2];

^[1]; Saini, Arun ^[1]; Sharma, Dheeraj ^[3]; Sun, Ding ^[1]

Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Michigan State Univ., East Lansing, MI (United States)
Raja Ramanna Center for Advanced Technology (RRCAT) (India)

Publication Date:: 2018-07-01

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.

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                    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

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                    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.

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@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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