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Title: SRF cavity testing using a FPGA Self Excited Loop

Abstract

Various authors have previously studied the theory and practice of cavity testing, notably an extensive treatment by Powers [1] and Padamsee [2]. The advent of the digital Low Level RF (LLRF) electronics based on Field Programmable Logic Arrays (FPGA) provides various improvements over the rather complex systems used in the past as well as enabling new measurement techniques.In this document we reintroduce a technique that seems to have fallen out of practice in recent times, that is obtaining the coupling constant β through measurements from just one port, the reflected power port, of the directional coupler placed in front of the cavity.

Authors:
 [1]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
OSTI Identifier:
1392253
Report Number(s):
BNL-114286-2017-IR
R&D Project: KBCH139; KB0202011
DOE Contract Number:  
SC0012704
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Ben-Zvi, I. SRF cavity testing using a FPGA Self Excited Loop. United States: N. p., 2017. Web. doi:10.2172/1392253.
Ben-Zvi, I. SRF cavity testing using a FPGA Self Excited Loop. United States. doi:10.2172/1392253.
Ben-Zvi, I. Wed . "SRF cavity testing using a FPGA Self Excited Loop". United States. doi:10.2172/1392253. https://www.osti.gov/servlets/purl/1392253.
@article{osti_1392253,
title = {SRF cavity testing using a FPGA Self Excited Loop},
author = {Ben-Zvi, I.},
abstractNote = {Various authors have previously studied the theory and practice of cavity testing, notably an extensive treatment by Powers [1] and Padamsee [2]. The advent of the digital Low Level RF (LLRF) electronics based on Field Programmable Logic Arrays (FPGA) provides various improvements over the rather complex systems used in the past as well as enabling new measurement techniques.In this document we reintroduce a technique that seems to have fallen out of practice in recent times, that is obtaining the coupling constant β through measurements from just one port, the reflected power port, of the directional coupler placed in front of the cavity.},
doi = {10.2172/1392253},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Aug 30 00:00:00 EDT 2017},
month = {Wed Aug 30 00:00:00 EDT 2017}
}

Technical Report:

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