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Title: Study of Fluctuations in Undulator Radiation in the IOTA Ring at Fermilab

Abstract

We study turn-by-turn fluctuations in the number of emitted photons in an undulator, installed in the IOTA electron storage ring at Fermilab with an InGaAs PIN photodiode and an integrating circuit. Our study was motivated by the previous experiment *. We propose a theoretical model for the experimental data from * and in our own experiment we attempted to verify the model in an independent and more systematic way. Moreover, these fluctuations are an interesting subject for a study by itself, since they act as a seed for SASE in FELs. We improve the precision of the measurements from * by subtracting the average signal amplitude using a comb filter with a one-turn IOTA delay, and by using a special algorithm for noise subtraction. We obtain a reasonable agreement between our theoretical model and experiment. Along with repeating the experiment from *, which was performed at a constant beam current, we also collect data for fluctuations in undulator light at different beam current values. Lastly, in our experiment we were able to see the transition from Poisson statistics to Super-Poisson statistics for undulator light, whereas in * only the latter statistics was observed.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [2];  [3]; ORCiD logo [4];  [5]; ORCiD logo [4]; ORCiD logo [4]; ORCiD logo [6]; ORCiD logo [4];  [4];  [2]
  1. Chicago U.
  2. SLAC
  3. Argonne (main)
  4. Fermilab
  5. RadiaBeam Tech.
  6. Brookhaven Natl. Lab.
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1576544
Report Number(s):
FERMILAB-CONF-19-222-AD-DI
oai:inspirehep.net:1743463
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Conference
Resource Relation:
Conference: 10th International Particle Accelerator Conference, Melbourne, Australia, 05/19-05/24/2019
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS

Citation Formats

Lobach, Ihar, Halavanau, Aliaksei, Huang, Zhirong, Kim, Kwang-Je, Lebedev, Valeri, Murokh, Alex, Nagaitsev, Sergei, Romanov, Alexander, Shaftan, Timur, Stancari, Giulio, Valishev, Alexander, and Yakimenko, Vitaly. Study of Fluctuations in Undulator Radiation in the IOTA Ring at Fermilab. United States: N. p., 2019. Web. doi:10.18429/JACoW-IPAC2019-MOPRB088.
Lobach, Ihar, Halavanau, Aliaksei, Huang, Zhirong, Kim, Kwang-Je, Lebedev, Valeri, Murokh, Alex, Nagaitsev, Sergei, Romanov, Alexander, Shaftan, Timur, Stancari, Giulio, Valishev, Alexander, & Yakimenko, Vitaly. Study of Fluctuations in Undulator Radiation in the IOTA Ring at Fermilab. United States. doi:10.18429/JACoW-IPAC2019-MOPRB088.
Lobach, Ihar, Halavanau, Aliaksei, Huang, Zhirong, Kim, Kwang-Je, Lebedev, Valeri, Murokh, Alex, Nagaitsev, Sergei, Romanov, Alexander, Shaftan, Timur, Stancari, Giulio, Valishev, Alexander, and Yakimenko, Vitaly. Mon . "Study of Fluctuations in Undulator Radiation in the IOTA Ring at Fermilab". United States. doi:10.18429/JACoW-IPAC2019-MOPRB088. https://www.osti.gov/servlets/purl/1576544.
@article{osti_1576544,
title = {Study of Fluctuations in Undulator Radiation in the IOTA Ring at Fermilab},
author = {Lobach, Ihar and Halavanau, Aliaksei and Huang, Zhirong and Kim, Kwang-Je and Lebedev, Valeri and Murokh, Alex and Nagaitsev, Sergei and Romanov, Alexander and Shaftan, Timur and Stancari, Giulio and Valishev, Alexander and Yakimenko, Vitaly},
abstractNote = {We study turn-by-turn fluctuations in the number of emitted photons in an undulator, installed in the IOTA electron storage ring at Fermilab with an InGaAs PIN photodiode and an integrating circuit. Our study was motivated by the previous experiment *. We propose a theoretical model for the experimental data from * and in our own experiment we attempted to verify the model in an independent and more systematic way. Moreover, these fluctuations are an interesting subject for a study by itself, since they act as a seed for SASE in FELs. We improve the precision of the measurements from * by subtracting the average signal amplitude using a comb filter with a one-turn IOTA delay, and by using a special algorithm for noise subtraction. We obtain a reasonable agreement between our theoretical model and experiment. Along with repeating the experiment from *, which was performed at a constant beam current, we also collect data for fluctuations in undulator light at different beam current values. Lastly, in our experiment we were able to see the transition from Poisson statistics to Super-Poisson statistics for undulator light, whereas in * only the latter statistics was observed.},
doi = {10.18429/JACoW-IPAC2019-MOPRB088},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {6}
}

Conference:
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