Externally Heated Hollow Cathode Arc Plasma Source for Experiments in Plasma Wakefield Acceleration

An externally heated, hollow cathode arc source was recommissioned at UCLA for use in experiments to drive plasma wakefields with shaped beams at the Argonne Wakefield Accelerator. The hollow cathode arc source provides a robust plasma column with a density in the <inline-formula> <math dis...

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Main Authors:	Ryan Roussel, Gerard Andonian, Claire Hansel, Gerard Lawler, Walter Lynn, Nathan Majernik, River Robles, Kunal Sanwalka, Eric Wisniewski, James Rosenzweig
Format:	Article
Language:	English
Published:	MDPI AG 2019-09-01
Series:	Instruments
Subjects:	plasma wakefield acceleration hollow cathode arc discharge
Online Access:	https://www.mdpi.com/2410-390X/3/3/48

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spelling	doaj-2eddcb50b0ce48a8becb4380bc80bf1d2020-11-25T01:31:31ZengMDPI AGInstruments2410-390X2019-09-01334810.3390/instruments3030048instruments3030048Externally Heated Hollow Cathode Arc Plasma Source for Experiments in Plasma Wakefield AccelerationRyan Roussel0Gerard Andonian1Claire Hansel2Gerard Lawler3Walter Lynn4Nathan Majernik5River Robles6Kunal Sanwalka7Eric Wisniewski8James Rosenzweig9Particle Beam Physics Laboratory, University of California Los Angeles, Los Angeles, CA 90095, USAParticle Beam Physics Laboratory, University of California Los Angeles, Los Angeles, CA 90095, USAParticle Beam Physics Laboratory, University of California Los Angeles, Los Angeles, CA 90095, USAParticle Beam Physics Laboratory, University of California Los Angeles, Los Angeles, CA 90095, USAParticle Beam Physics Laboratory, University of California Los Angeles, Los Angeles, CA 90095, USAParticle Beam Physics Laboratory, University of California Los Angeles, Los Angeles, CA 90095, USAParticle Beam Physics Laboratory, University of California Los Angeles, Los Angeles, CA 90095, USAParticle Beam Physics Laboratory, University of California Los Angeles, Los Angeles, CA 90095, USAArgonne Wakefield Accelerator, Argonne National Laboratory, Lemont, IL 60439, USAParticle Beam Physics Laboratory, University of California Los Angeles, Los Angeles, CA 90095, USAAn externally heated, hollow cathode arc source was recommissioned at UCLA for use in experiments to drive plasma wakefields with shaped beams at the Argonne Wakefield Accelerator. The hollow cathode arc source provides a robust plasma column with a density in the <inline-formula> <math display="inline"> <semantics> <msup> <mn>10</mn> <mn>13</mn> </msup> </semantics> </math> </inline-formula>−<inline-formula> <math display="inline"> <semantics> <msup> <mn>10</mn> <mn>14</mn> </msup> </semantics> </math> </inline-formula> cm<inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mrow> <mo>−</mo> <mn>3</mn> </mrow> </msup> </semantics> </math> </inline-formula> range while external heating of the cathode allows the plasma arc regime to be accessed with applied voltages down to 20 V. Overall source operating principals are described, along with time-resolved plasma current measurements and plasma density characterization with the use of a triple Langumir probe. The results show that relevant plasma densities that match facility beam parameters are readily achievable.https://www.mdpi.com/2410-390X/3/3/48plasma wakefield accelerationhollow cathode arcdischarge
collection	DOAJ
language	English
format	Article
sources	DOAJ
author	Ryan Roussel Gerard Andonian Claire Hansel Gerard Lawler Walter Lynn Nathan Majernik River Robles Kunal Sanwalka Eric Wisniewski James Rosenzweig
spellingShingle	Ryan Roussel Gerard Andonian Claire Hansel Gerard Lawler Walter Lynn Nathan Majernik River Robles Kunal Sanwalka Eric Wisniewski James Rosenzweig Externally Heated Hollow Cathode Arc Plasma Source for Experiments in Plasma Wakefield Acceleration Instruments plasma wakefield acceleration hollow cathode arc discharge
author_facet	Ryan Roussel Gerard Andonian Claire Hansel Gerard Lawler Walter Lynn Nathan Majernik River Robles Kunal Sanwalka Eric Wisniewski James Rosenzweig
author_sort	Ryan Roussel
title	Externally Heated Hollow Cathode Arc Plasma Source for Experiments in Plasma Wakefield Acceleration
title_short	Externally Heated Hollow Cathode Arc Plasma Source for Experiments in Plasma Wakefield Acceleration
title_full	Externally Heated Hollow Cathode Arc Plasma Source for Experiments in Plasma Wakefield Acceleration
title_fullStr	Externally Heated Hollow Cathode Arc Plasma Source for Experiments in Plasma Wakefield Acceleration
title_full_unstemmed	Externally Heated Hollow Cathode Arc Plasma Source for Experiments in Plasma Wakefield Acceleration
title_sort	externally heated hollow cathode arc plasma source for experiments in plasma wakefield acceleration
publisher	MDPI AG
series	Instruments
issn	2410-390X
publishDate	2019-09-01
description	An externally heated, hollow cathode arc source was recommissioned at UCLA for use in experiments to drive plasma wakefields with shaped beams at the Argonne Wakefield Accelerator. The hollow cathode arc source provides a robust plasma column with a density in the <inline-formula> <math display="inline"> <semantics> <msup> <mn>10</mn> <mn>13</mn> </msup> </semantics> </math> </inline-formula>−<inline-formula> <math display="inline"> <semantics> <msup> <mn>10</mn> <mn>14</mn> </msup> </semantics> </math> </inline-formula> cm<inline-formula> <math display="inline"> <semantics> <msup> <mrow></mrow> <mrow> <mo>−</mo> <mn>3</mn> </mrow> </msup> </semantics> </math> </inline-formula> range while external heating of the cathode allows the plasma arc regime to be accessed with applied voltages down to 20 V. Overall source operating principals are described, along with time-resolved plasma current measurements and plasma density characterization with the use of a triple Langumir probe. The results show that relevant plasma densities that match facility beam parameters are readily achievable.
topic	plasma wakefield acceleration hollow cathode arc discharge
url	https://www.mdpi.com/2410-390X/3/3/48
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Externally Heated Hollow Cathode Arc Plasma Source for Experiments in Plasma Wakefield Acceleration

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