Upload File

beam instrumentation for the hie-isolde linac francesca zocca isolde workshop and users meeting -...

  • Home
  • Documents
  • Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la
18
Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la Materia – CSIC , Madrid CERN - BE/BI/PM on behalf of BE-BI group and HIE-ISOLDE collaboration

Upload: carmel-houston

Post on 17-Jan-2016

215 views

Category:

Documents


0 download

Report

TRANSCRIPT

Page 1: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

Beam Instrumentation for the HIE-ISOLDE linac

Francesca Zocca

ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN

Instituto de Estructura de la Materia – CSIC , Madrid CERN - BE/BI/PM

on behalf of BE-BI group and HIE-ISOLDE collaboration

Page 2: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

Outline

Beam instrumentation overview for the HIE-ISOLDE super-conducting linac

Inter-tank diagnostic boxes for beam intensity, position and transverse profile measurements: design status

Silicon detector monitor for cavity phase-up and longitudinal profile measurements: test results of the first prototype

Conclusions & outlook

Page 3: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

Beam diagnostics tasks

intensity

position

transverse profile

Main beam parameters to be measured:

diagnostic box (“short-box”) in each inter-cryomodule region Faraday cup, slit and current-sensitive device (for low intensity beams)

Page 4: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

Beam diagnostics tasks

intensity

position

transverse profile

transverse emittance

Main beam parameters to be measured:

diagnostic box (“short-box”) in each inter-cryomodule region Faraday cup, slit and current-sensitive device (for low intensity beams)

transverse emittance meter

Page 5: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

Beam diagnostics tasks

intensity

position

transverse profile

transverse emittance

energy - relative (cavity phase-up)

- absolute

Main beam parameters to be measured:

diagnostic box (“short-box”) in each inter-cryomodule region Faraday cup, slit and current-sensitive device (for low intensity beams)

transverse emittance meter

silicon monitor

ToF system

Page 6: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

Beam diagnostics tasks

intensity

position

transverse profile

transverse emittance

energy - relative (cavity phase-up)

- absolute

longitudinal profile and emittance

(energy and time spread)

Main beam parameters to be measured:

diagnostic box (“short-box”) in each inter-cryomodule region Faraday cup, slit and current-sensitive device (for low intensity beams)

transverse emittance meter

silicon monitor

ToF system

Spectrometer and/or solid state detectors

Page 7: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

HIE-linac inter-tank diagnostic boxes

IN IC1 IC2 IC3 IC4 IC5 OUT

Faraday cup for stable pilot beams (down to 0.5 pA)

NEW device to be developed for lower currents (from 107 pps to a few pps)

CURRENT/INTENSITY MONITOR:

beam intensity, position and transverse profile measurements

Inter-tank region preliminary scheme

Page 8: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

Vacuum valve

Diagnostic Box

Warm Steerer magnet

Vacuum valve

90mm

16mm =

210m

m

Short-box preliminary design

Provided by : Julio Galipienzo – AVS company (Added Value Solutions) – Gipuzkoa, Spain

Page 9: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

Short-box preliminary design

Provided by : Julio Galipienzo – AVS company (Added Value Solutions) – Gipuzkoa, Spain

Page 10: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

HIE-ISOLDE linac & cavity phase-up

Increase in the number of cavities: from 5 (REX) to 34 (HIE-REX)

REX phase-up procedure: relative measurement of the beam average energy vs. the RF phase downstream the cavity by means of the switchyard dipole magnet

robust and reliable procedure but time consuming and difficult to automate

REX

HIE-REX

6 cryomodules with 32 superconducting cavities

Need for a quick and eventually automated phase-up

Page 11: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

Silicon detector monitor

Area= 50mm2 / 25 mm2 Thickness = 300 m / 500 m Bias voltage = +60 V / +100 V Capacitance = 30 pF / 11 pF

Canberra PIPS det Mechanical support Test setup inside one REX diagnostic box

beam

Longitudinal profile monitor to be placed downstream the cryomodules aimed at the phase tuning of the superconducting cavities

High sensitivity required by the low intensity beams at REX (100-500pA pilot beams)

PIPS (Passivated Implanted Planar Silicon) detector, suited for charged particle spectroscopy beam particles stopped measure of energy and time of arrival

Page 12: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

Monitor structure and DAQ setup

PREAMPLIFIER

SHAPING AMPLIFIER

MULTI-CHANNELANALYZER

DISCRIMINATOR

TIME-to-DIGITAL CONVERTER

FREQ. DIVIDER

PIPS detector RF master-clock

COMPUTER

energy timing

Energy spectrum Timing spectrum

BEAM

actuator

Canberra 2003 BT

Ortec mod. 572/ Caen mod. N968

Spec. Tech. ICS-PCI card / Caen V1785N peak-sensing ADC

RF-CERN PS equip.

Le Croy 4608C

Caen V1290N (25 ps LSB)

101.28 MHz

Page 13: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

Beam attenuation methods manipulation of REXEBIS parameters + collimators along the linac:

removing the time structure of the pulse extracted from the EBIS (Electron Beam Ion Source) resulted in a strongly reduced beam intensity

perforated copper foils placed upstream and downstream the RFQ:

thickness=15 m (particle energy 5keV-300keV) holes diameters = 50 m and 35 m holes spacing = 0.2-5 mm transmission factors per foil = 5% - 0.01%

Page 14: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

Beam energy spectrum

Helium, carbon, oxygen and neon

peaks well identified

REX BEAM SPECTRUM at 300 keV/u and A/Q=4

Average particle count rate = 100 Hz (count rate of 6.7 kHz in the RF pulse window)

Measured monitor energy resolution: in the range from 1.3 to 0.4 % rms (3 to 1 % FWHM)

while varying REX beam energy from 300 keV/u to 3 MeV/u

Page 15: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

Cavity phase-up demonstration

)(2sin)(cos)(0 cbaW

Fast and accurate phase-up procedure of REX 7-gap resonator @ 1.95 MeV/u

Peak channel number of the energy signal quickly recorded as a function of the RF phase

synchronous phase determined with the required accuracy of ± 2.5 degrees even with a minimized number of points in the phase-up curve

reasonable measurement time of a few minutes per cavity (@ 100Hz count rate)

Page 16: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

Beam time profile

Acquired beam time structure with the expected bunch period of 9.87 ns (RF=101.28MHz) @ energy = 2.83 MeV (output energy of the 9-gap resonator)

Measured bunch length of 2.5 ns FWHM compatible with the time spread expected at the output of the 9-gap resonator and after a drift of approximately 9 m to the silicon detector

Estimated system timing resolution better than 200 ps rms

Page 17: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

Time-of-Flight cavity phase-up

The bunches arrival time vary up to 90 ns over the 10.6 m drift distance between the cavity and the silicon detector monitor

Bunch spacing of 9.87 ns :

phase must be varied slowly to be able to identify the bunch

too much time-consuming

Principle demonstrated viable option for cavity phasing should a chopper be incorporated in the HIE-ISOLDE upgrade and the bunch spacing increased

Page 18: Beam Instrumentation for the HIE-ISOLDE linac Francesca Zocca ISOLDE Workshop and Users Meeting - 5-7 December 2011 - CERN Instituto de Estructura de la

Almost complete design of the inter-tank short boxes aimed at intensity, position and transverse profile measurements

Successful test of a prototype Si-detector monitor for longitudinal profile measurements aimed at cavity phase-up

Future developments:

Inter-tank short boxes: electronic read-out chain, test of a first prototype either at CERN or on other beam lines outside CERN

R&D of a detection system to measure the faint currents of radioactive beams, to be integrated in the short-boxes

Si detector: automated system control, optimization of the intensity attenuation factors to achieve the fastest possible phase-up

Emittance-meter design (slit + profiler based on short-box design)

Conclusions & outlook


Radiation Protection Studies for the HIE ISOLDE Post-Accelerator

M. Pasini on behalf of the HIE-ISOLDE design team CERN ... · HIE-ISOLDE: T HE S UPERCONDUCTING RIB L INAC AT CERN M. Pasini on behalf of the HIE-ISOLDE design team CERN, Geneva,

TSR@HIE-ISOLDE, 27 Feb 2012 Erwin Siesling 1 TSR Max Planck Institute Heidelberg TSR @ Hie-Isolde TSR@Hie-ISOLDE LOI endored Jan 2011 TDR submitted Jan

Highlights of the ISOLDE Facilityand the HIE-ISOLDE Project

HIE-ISOLDE Status & Summary of HIE-ISOLDE SC

Ideas for REX/HIE-ISOLDE Upgrade · 2019. 6. 4. · REX/HIE-ISOLDE before LS2 Phase 2B of HIE-ISOLDE completed and operational since 2018: Four cryomodules Three High Energy Transfer

HIE-ISOLDE Project

Floor plans, Infrastructure Logistics Hie-Isolde Spectrometer Workshop Physics Department, Lund University 10 March, 2011 Hie-Isolde Erwin Siesling

HIE-ISOLDE Project Status Report Yacine KADI CERN HIE-ISOLDE Project

HIE ISOLDE Cavity Developments

HIE -ISOLDE Project: Status Report

HIE-ISOLDE SC-RF Cavities

HIE-ISOLDE Project Status Report Y. Kadi for the HIE-ISOLDE Project Team HIE-ISOLDE Physics Coordination WG Meeting CERN, 16 February 2015

HIE-ISOLDE ALIGNMENT AND MONITORING SYSTEM SOFTWARE … · HIE-ISOLDE Alignment and monitoring Software and test mock up - IWAA2012 - September, 2012 2 1. Alignment Specifications

HIE -ISOLDE Project Status Report

High Performance Charge Breeder for HIE-ISOLDE and TSR

Status of The HIE-ISOLDE Design Study

RDDS measurements at RITU and prospects at HIE-ISOLDE

HIE-ISOLDE Status Report

Latest results from MINIBALL at REX‐ISOLDE Overview physics case Last REX-ISOLDE campaign Perspectives with HIE-ISOLDE Peter Reiter

Charge breeder for HIE-ISOLDE and TSR@ISOLDE

HIE-ISOLDE, the project and the physics opportunities...HIE-ISOLDE, the project and the physics opportunities M.J.G. Borge1,2 a and K. Riisager3 1 ISOLDE, EP Department, CERN, CH-1211

HIE-ISOLDE Project Status Report Y. Kadi for the HIE-ISOLDE Project Team 49th INTC Meeting CERN, 11 February 2015

HIE-ISOLDE contribution packages M. Pasini BE/RF

HIE-ISOLDE - Universität zu Kölnwarr/doc/hie-isolde.pdf · 2016. 9. 20. · HIE-ISOLDE Nigel Warr June 2015 Contents 1 Introduction3 2 Naming ... The beam lines join to the common

HIE-ISOLDE HEBT: characteristics

The HIE-ISOLDE Faraday Cup

HIE-ISOLDE Project Y. Kadi (EN-STI) On behalf of the HIE-ISOLDE Coordination team

UNIVERSITY OF JYVÄSKYLÄ RDDS measurements at RITU and prospects at HIE-ISOLDE T. Grahn University of Jyväskylä HIE-ISOLDE Spectrometer Workshop, Lund 10.-11.3.2011

Status of the HIE-ISOLDE Project

Safety Issues for HIE-ISOLDE and nTOF-Ph2

HIE-LINAC and Beam lines for HIE-ISOLDE experiments...HIE-ISOLDE-PROJECT-Note-0003 HIE-LINAC and Beam lines for HIE-ISOLDE experiments M. Pasini Abstract The document gives a brief

CERN-ISCC Meeting “ Storage Ring Facility at HIE-ISOLDE ”

Report on HIE-ISOLDE Status & International Advisory Panel Meeting

New Opportunities with HIE ISOLDE Piet Van Duppen KU Leuven, Belgium Introduction: Radioactive Ion Beam (RIB) physics: key questions HIE ISOLDE opportunities