Development of a Prototype Electro-Optic Beam Position Monitor at the CERN SPS

Alberto Arteche; Alessio Bosco; Stephen Gibson; N. Chritin; D. Draskovic; Thibaut Lefevre; Tom Levens

doi:10.18429/JACoW-IBIC2016-WEPG09

Development of a Prototype Electro-Optic Beam Position Monitor at the CERN SPS

Alberto Arteche
, Alessio Bosco
, Stephen Gibson
, N. Chritin
, D. Draskovic
, Thibaut Lefevre
, Tom Levens

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

A novel electro-optic beam position monitor capable of rapidly (<50ps) monitoring transverse intra-bunch perturbations is under development for the HL-LHC project. The EO-BPM relies on the fast optical response of two pairs of electro-optic crystals, whose birefringence is modified by the passing electric field of a 1ns proton bunch. Analytic models of the electric field are compared with electromagnetic simulations. A preliminary opto-mechanical design of the EO-BPM was manufactured and installed at the CERN SPS in 2016. The prototype is equipped with two pairs of 5mm cubic LiNbO3 crystals, mounted in the horizontal and vertical planes. A polarized CW 780nm laser in the counting room transmits light via 160m of PM fibre to the SPS, where delivery optics directs light through a pair of crystals in the accelerator vacuum. The input polarization state to the crystal can be remotely controlled. The modulated light after the crystal is analyzed, fibre-coupled and recorded by a fast photodetector in the counting room. Following the recent installation, we present the detailed setup and report the latest status on commissioning the device in-situ at the CERN SPS.

Original language	English
Title of host publication	5th International Beam Instrumentation Conference
Subtitle of host publication	11-15 September 2016, Barcelona, Spain
Place of Publication	Geneva
Publisher	JACoW Publishing
Pages	1-4
Number of pages	4
ISBN (Electronic)	978-3-95450-177-9
DOIs	https://doi.org/10.18429/JACoW-IBIC2016-WEPG09
Publication status	Published - Feb 2017

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10.18429/JACoW-IBIC2016-WEPG09Licence: CC BY

Cite this

@inproceedings{5e290c81f50e482b8564dd5f8fb6585d,

title = "Development of a Prototype Electro-Optic Beam Position Monitor at the CERN SPS",

abstract = "A novel electro-optic beam position monitor capable of rapidly (<50ps) monitoring transverse intra-bunch perturbations is under development for the HL-LHC project. The EO-BPM relies on the fast optical response of two pairs of electro-optic crystals, whose birefringence is modified by the passing electric field of a 1ns proton bunch. Analytic models of the electric field are compared with electromagnetic simulations. A preliminary opto-mechanical design of the EO-BPM was manufactured and installed at the CERN SPS in 2016. The prototype is equipped with two pairs of 5mm cubic LiNbO3 crystals, mounted in the horizontal and vertical planes. A polarized CW 780nm laser in the counting room transmits light via 160m of PM fibre to the SPS, where delivery optics directs light through a pair of crystals in the accelerator vacuum. The input polarization state to the crystal can be remotely controlled. The modulated light after the crystal is analyzed, fibre-coupled and recorded by a fast photodetector in the counting room. Following the recent installation, we present the detailed setup and report the latest status on commissioning the device in-situ at the CERN SPS.",

author = "Alberto Arteche and Alessio Bosco and Stephen Gibson and N. Chritin and D. Draskovic and Thibaut Lefevre and Tom Levens",

year = "2017",

month = feb,

doi = "10.18429/JACoW-IBIC2016-WEPG09",

language = "English",

pages = "1--4",

booktitle = "5th International Beam Instrumentation Conference",

publisher = "JACoW Publishing",

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T1 - Development of a Prototype Electro-Optic Beam Position Monitor at the CERN SPS

AU - Arteche, Alberto

AU - Bosco, Alessio

AU - Gibson, Stephen

AU - Chritin, N.

AU - Draskovic, D.

AU - Lefevre, Thibaut

AU - Levens, Tom

PY - 2017/2

Y1 - 2017/2

N2 - A novel electro-optic beam position monitor capable of rapidly (<50ps) monitoring transverse intra-bunch perturbations is under development for the HL-LHC project. The EO-BPM relies on the fast optical response of two pairs of electro-optic crystals, whose birefringence is modified by the passing electric field of a 1ns proton bunch. Analytic models of the electric field are compared with electromagnetic simulations. A preliminary opto-mechanical design of the EO-BPM was manufactured and installed at the CERN SPS in 2016. The prototype is equipped with two pairs of 5mm cubic LiNbO3 crystals, mounted in the horizontal and vertical planes. A polarized CW 780nm laser in the counting room transmits light via 160m of PM fibre to the SPS, where delivery optics directs light through a pair of crystals in the accelerator vacuum. The input polarization state to the crystal can be remotely controlled. The modulated light after the crystal is analyzed, fibre-coupled and recorded by a fast photodetector in the counting room. Following the recent installation, we present the detailed setup and report the latest status on commissioning the device in-situ at the CERN SPS.

AB - A novel electro-optic beam position monitor capable of rapidly (<50ps) monitoring transverse intra-bunch perturbations is under development for the HL-LHC project. The EO-BPM relies on the fast optical response of two pairs of electro-optic crystals, whose birefringence is modified by the passing electric field of a 1ns proton bunch. Analytic models of the electric field are compared with electromagnetic simulations. A preliminary opto-mechanical design of the EO-BPM was manufactured and installed at the CERN SPS in 2016. The prototype is equipped with two pairs of 5mm cubic LiNbO3 crystals, mounted in the horizontal and vertical planes. A polarized CW 780nm laser in the counting room transmits light via 160m of PM fibre to the SPS, where delivery optics directs light through a pair of crystals in the accelerator vacuum. The input polarization state to the crystal can be remotely controlled. The modulated light after the crystal is analyzed, fibre-coupled and recorded by a fast photodetector in the counting room. Following the recent installation, we present the detailed setup and report the latest status on commissioning the device in-situ at the CERN SPS.

U2 - 10.18429/JACoW-IBIC2016-WEPG09

DO - 10.18429/JACoW-IBIC2016-WEPG09

M3 - Conference contribution

SP - 1

EP - 4

BT - 5th International Beam Instrumentation Conference

PB - JACoW Publishing

CY - Geneva

ER -