CCC MeetingCCC Meeting
Cryogenic Current Comparatorin the FAIR Project
Overview of FAIR / current status
Beam diagnostics work package
Tasks and installation locations for CCCs
Boundary conditions / requirements
Example: SIS100 extraction beam line
Jena, 7. April 2008
Marcus Schwickert, GSI Beam Diagnostics
CCC Meeting, CCC for FAIR , M. Schwickert, April 7, 2008 2
FAIR OverviewFAIR Overview
Existing UNILAC & SIS as injector after upgrade
p-LINAC: high current 70 mA, 70 MeV
SIS100: Superconducting, 100 Tm, 1-10 GeV/uhigh current operation p to Udesign: p:4*1013, U28+: 5*1011
SIS300: 300 Tm, stretcher or acceleration up to 30 GeV/u
CR: stochastic cooling of RIB and pbar
RESR: accumulation of pbar, deceleration of RIB
NESR: versatile experimental ring for stable ions, RIB, pbar cooling, gas-target, e-A collider
HESR: storage and acceleration of pbar to 14 GeV/u
HEBT: for fast & slow extraction and low & high currents.
CCC Meeting, CCC for FAIR , M. Schwickert, April 7, 2008 3
Current StatusCurrent Status
FAIR Kick-Off Event 7. November 2007International partners signed communiqué:
At the moment: FAIR Technical Meetings on EoIs
In total 21 Expressions of Interest were submitted, i.e. international partners express their interest to take over responsibility for a FAIR work package
Two possibilities for contributions: 1. In-kind, i.e. delivery of accelerator parts
2. cash
Austria, Germany, Spain, Finland, France, Poland, Romania, Russia, Sweden, Great Britain and State of Hesse
CCC Meeting, CCC for FAIR , M. Schwickert, April 7, 2008 4
Work Breakdown StructureWork Breakdown Structure
∙94 WPs defined according to WBS, FBTR and Cost Book schematics
CCC Meeting, CCC for FAIR , M. Schwickert, April 7, 2008 5
Beam Diagnostic System DefinitionBeam Diagnostic System Definition
as given in the Work Breakdown Structure (WBS-Code 2.5.6)
Constituents of a Beam Diagnostic System:
• Vacuum chamber• Detector / Sensor • Mechanics / Actuators / Feed-throughs• Analog and front-end Electronics• Cabling („short“ and „long“)• All Sub-systems (High voltage, Pressured air and Stepping motor control etc.)• Data Acquisition (VME, cPCI, PXI, ..)
What is not included?
• Vacuum infrastructure: pumps, pressure measurement
• Technical infrastructure: electricity, Pressured Air distribution, etc.• Controls infrastructure: Ethernet, timing distribution
CCC Meeting, CCC for FAIR , M. Schwickert, April 7, 2008 6
Work Package StructureWork Package Structure
Detector
Drive
Mechanics
Digitization
Long Cables
Embedded Controller
Analog-Electronics
Analog-Elektronics
Network
Subsystems:HV / Gases /
Compressed Air Step. motor ctrl.
• NO common scheme valid FOR ALL ~30 different beam diagnostic systems
Accelerator Tunnel Electronics room
Schematic for Beam Diagnostic Device
Accelerator Control System
• ADC• Scaler/Counter• Digitizer• I/O-board• Controller• Data concentrator/DSP• DAQ software
Common Realization:GSI Contribution
Data AcquisitionEoI 13
CCC Meeting, CCC for FAIR , M. Schwickert, April 7, 2008 7
Overview CR Beam DiagnosticsOverview CR Beam Diagnostics
Device QuantityStartphase Phase B
Measured Parameter Remark
DC Transformer 1 - DC current stored current, beam lifetime
AC Transformer 1 - pulse current Injection efficiency
Cryogenic Current Comparator 1 - pulse current high intensities, ongoing R&D
Beam Position Monitor (warm) 18 - centre-of-mass closed orbit, turn-by-turn variation, R&D
Tune Measurement 1 - centre-of-mass after excitation
Tune by BTF, Tune by noise excitation, PLL tune tracking
Schottky Pick-Up 1 - Momentum distribution, Transverse Schottky
p/p determination, tune, chromaticity
Quadrupolar BPM 0 +1 quadr. Moment x2- y
2 2nd beam moments, Inj. matching, R&D
Wall Current Monitor 1 - broadband bunch structure longit. emittance, bunch gymnastics, R&D
Residual Gas Profile Monitor 0 +1 transverse profile profile & position, high intensities, R&D
Beam Loss Monitor 8 +28 Beam loss mis-steering of magnets, halo detection at scrapers
Scintillation Screen 2 - transverse profile profile & position, low intensities
SEM-Grid (PG) 2 - transverse profile profile & position ongoing R&D
Faraday-Cup / Beam stopper 2 - First turn diagnostics
Scraper (hor./vert.) 8/4 - beam profile Transverse profile, beam alignment
CCC Meeting, CCC for FAIR , M. Schwickert, April 7, 2008 8
Overlaping Systems of Beam DiagnosticsOverlaping Systems of Beam Diagnostics
BD System HEBT SIS100
SIS300
CR RESR NESR SFRS PBar HESR pLinac
DC Transformer Pulse Transformer Cryogenic Current Comparator Beam Position Monitor (warm) Tune Measurement Schottky Pick-Up Residual Gas Profile Monitor Beam Loss Monitor Scintillation Screen SEM-Grid Faraday-Cup / Beam stopper Data Acquisition
Goal: Use similar diagnostic devices for all machines to maximum extent !
Comprehensive Data Acquisition : common realization is essential
CCC Meeting, CCC for FAIR , M. Schwickert, April 7, 2008 9
Expressions of Interest (EoI)Expressions of Interest (EoI)
Only 2 expressions of interest related to beam diagnostics:
•Who will build the rest ??
•Fear of "Heidelberg-Syndrome"
•No EoI for CCC yet
• ~700 MEuro german contribution to FAIR
• ?? MEuro for civil construction
• ~15 MEuro for "data acquisition"
• NO margin left for additional workpackage, e.g. CCC !!
CCC Meeting, CCC for FAIR , M. Schwickert, April 7, 2008 10
CCC Installation LocationsCCC Installation Locations
Extraction SIS100/300
Beam dump
S-FRS target
Extraction SIS18
6 CCC are foreseen for transmission determination
CCC Meeting, CCC for FAIR , M. Schwickert, April 7, 2008 11
Installation Locations in HEBTInstallation Locations in HEBT
bl# rig.[Tm] part. ex. RT WCM BPM GRID SCR BIF CCC PDC MWPC SH SV1 1-18 i, p s, f 2 1 3 4 4 1 1 2 4 4 76 27-100 i, p s, f 1 1 2 3 1 1 1 1 3 3 2
10 64-300 i s 0 0 0 0 2 1 1 1 2 3 323 18-100 i s, f 1 1 1 1 1 1 1 1 1 1 124 64-300 i s 0 0 0 0 1 1 1 1 2 0 047 27-100 i,p s,f 1 1 1 1 1 1 1 1 1 1 1
Equipment of HEBT-beamlines with beam diagnostic devices (only beamlines including CCC are shown)
End of 2007: Detailed study of ion optical requirements for installation of beam diagnostic devices in HEBT by F. Hagenbuck (FAIR-SYN)Problem: Layout changed recently from superconducting to nc magnets!
Beam parameters of beams passing beamline #6:
CCC Meeting, CCC for FAIR , M. Schwickert, April 7, 2008 12
Example: Beamline # 6Example: Beamline # 6SIS100 – DUMP (hor.) Variante 1
RT, PDC
GRIDMWPC
GRIDMWPC
M6_3
BPMBPMBPM, BIF
BPM
GRID, MWPC SCR, BIF
M9_1 M9_2 M9_3
S6_1 S9_2S6_3 S9_1
WCM, CCC
M6_1
RT, PDCWCM, CCC
hor, verhor, ver hor ver hor
M6_2
GRIDMWPC
GRIDMWPC
S6_2
#6 (fast,slow) #9 (fast, slow) AS9_1(ver.)
Dip9 (hor.)
Dip9 (ver.)
SIS100
SCR
#9#6
CCC Meeting, CCC for FAIR , M. Schwickert, April 7, 2008 13
Requirements SIS100 ExtractionRequirements SIS100 Extraction
Mechanics: - very little space, closed packed installations (magnets, cryogenic infrastructure, beamlines...)
- restricted access (radiation safety)
... but: cryo-infrastructure is available
Electronics:
- problematic EMV (strong el.-magn. fields)
CCC Meeting, CCC for FAIR , M. Schwickert, April 7, 2008 14
Achievements SIS18-CCCAchievements SIS18-CCC
7x109 Ar11+ at 300 MeV/u within 1.2 s, readout 20 μs:
Prototype tested at GSI in the 90ies Improvement:
Nb instead Pb for the flux transducer
less temperature drift reached 0.25 nA/√Hz 8 nA @ 1 kHz R&D: GSI, DESY, MPI-K, Uni-Jena.
GSI prototype in 1997: HEBT: slow extraction online transmission control Rings: low stored current e.g. RIB.
Cryogenic Current Comparators:
CCC Meeting, CCC for FAIR , M. Schwickert, April 7, 2008 15
Goals for further developmentGoals for further development
The new CCC should have:- low noise characteristic- resolution possibly in sub nA-range (1 nA 2E08 pps U28+)- good magnetic shielding- installation volume as small as possible - standardized mechanical layout, matched also for SIS100 injection line- optimized He-cryostat for long term operation between refills- standardized electronics with defined interfaces for current signal and I/O
CCC Meeting, CCC for FAIR , M. Schwickert, April 7, 2008 16
SummarySummary
• FAIR project started, expressions of interest are being discussed
• Definition of beam diagnostic workpackage
• Standardization as basic concept for overlapping systems
• Beam diagnostic layout of HEBT beam lines
• Special requirements for SIS100 injection
• High resolution, good noise shielding, small insertion length as goals for future CCC prototype
Thank you for your attention.
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