Transcript No Slide Title

Superconducting Magnets and Laboratories:
Instrumentation for Magnetic Measurements
M Buzio, L Walckiers on behalf of TE/MSC/MM staff
Contents
1.
2.
3.
4.
5.
6.
LHC Spares
Support to LHC Operation
Support to LHC Operation
LHC upgrade Phase I
Magnet R&D – High Field Magnets
Magnet R&D – Fast-Cycled Magnets
Instrumentation for Magnetic Measurements” [email protected]
Review of Superconductors and Magnet Laboratories, 19-20 May 2009
Page 1/7
Magnetic Instrumentation for LHC Spares
• Demands
Capability to measure spares and repaired magnets to the same standard as the series
• Instrumentation
- All necessary equipment in working order (exception: large aperture magnets)
- Spares available: sufficient for long coil shafts and rotating units, integrators, moles, etc …
• Long-term issues: hardware
- Maintenance and calibration: key staff retired (or retiring soon), transmission of know-how to be ensured
- Coil manufacturing workshop: winding machines to be repaired, specialized component suppliers
(glue, wires …) to be renewed
- Single Stretched Wire (calibration reference): three units in operation, but hardware starts to fail and some
direct replacements out of stock (also, excellent support from Fermilab is nowadays much reduced)
 Need to re-develop internally for the long term
• Long-term issues: software
- Legacy platform = VME + LabView MMP on Sun workstations:
stable system, support calls answered efficiently by EN/ICE, but platform being phased out
- SMA database for coil calibration factors + raw/treated cold harmonic data discontinued
 all processing/file transfer dome manually (not a problem for infrequent measurements)
• Support needed
- EN/ICE/MTA: spare workstations/hard disks; MMP maintenance, backups, networking
- BE/ABP/SU: laser tracker operation/maintenance; cooperation for geometry (magnetic axis) measurements
- TE/MSC: coordination on relocation/operation of warm measurement systems (polarity checkers, DIMM/QIMM
moles)
Instrumentation for Magnetic Measurements” [email protected]
Review of Superconductors and Magnet Laboratories, 19-20 May 2009
Page 2/7
Magnetic Instrumentation in Support to LHC Operation
• Demands (see E. Todesco’s talk)
- Fill in the magnetic model of LHC (FIDEL)
- Validate the model on SM18 test benches (Tracking Tests)
- Long term: update FIDEL in response to evolution of power cycles, operation modes etc …
• Instrumentation
Standard instrument park + next-generation field acquisition platform (FAME – FAst Measurement Equipment)
Designed to ensure:
- long-term maintainability (PXI platform, modern electronic components)
- enhanced performance (200×bandwidth, 100×S/N over VME integrators)
- flexibility in a prototyping setting (C++ software running on Windows/Linux PC)
• Planned/under way developments
- Fast Digital Integrators (FDI): firmware revision for more flexible use (internal trigger generation + interrupt
handling) under way; finalization of hardware to achieve max. performance
- FAME coil shafts: one full SSS system + one spare MB system;
mechanism for longitudinal adaptation under study (essential for flexibility e.g. for correctors)
- FFMM C++ framework: interfaces with HW/SW components (e.g. SM18 power supplies and LSA control system),
fault detection, scripting, user interface
• Support needed
- Integrators: partially supported by external collaboration with Università del Sannio (Italy) + Technology
Transfer agreement with commercial partner (Metrolab, Geneva)
- FFMM software: fully supported by Università del Sannio
- Data storage: standard CERN Oracle support for storage of calibration data, raw and treated test results.
 Detailed data formats and interfaces to be finalized in accord with all potential users.
Instrumentation for Magnetic Measurements” [email protected]
Review of Superconductors and Magnet Laboratories, 19-20 May 2009
Page 3/7
FAME (FAst Measurement System) =
+
Adapted long coil shaft + Mobile Rotating Unit
+
PXI Fast Digital Integrators
(~25 prototypes operational)
FFMM C++ software
(prototype version 3.0 deployed)
• Status: 1 full system for MB operational in SM18 (some tests pending).
8 Hz rotation speed demonstrated (much higher bandwidth possible with interpolation)
• Components can be reused and adapted for different non-SC projects:
-
Harmonic DC/fast-cycled measurements for Linac4 PMQs and EMQs
Upgrade of magnetic material testing equipment (permeameter)
SSW upgrade (long-term maintainability)
3D Hall probe scanner.
Instrumentation for Magnetic Measurements” [email protected]
Review of Superconductors and Magnet Laboratories, 19-20 May 2009
Page 4/7
Magnetic Instrumentation for LHC Upgrade Phase I
• Demands
Warm/cold magnetic testing & quench detection of Ø120~180(?) mm NbTi magnets
(1~2 short models + 23 correctors + 24 series cryomagnets)
• Instrumentation
Single Stretched Wire: adequate for integral strength, magnetic axis and field direction.
Existing rotating coil systems are not adequate for accurate harmonic measurements
(ideally harmonic coil size  ⅔ aperture size)
• Planned R&D
- Large-diameter quadrupole compensated coil arrays (long shafts and/or mole with
optical tracking): mechanical stiffness and weight issues, calibration procedure
(present reference magnet aperture too small)
- Adaptation of mechanical and electronic components to harmonic coils system for large
diameters, horizontal or vertical cryostats (short models)
- Collaboration to development of suitable anticryostats
- Fabrication of coils/shafts for modular quench antennas; improvement of the reliability
of coils at cryogenic temperature (winding and curing procedure, quality of glue,
dedicated thermal cycling testing)
- Adaptation of acquisition system for fixed coil system (string test)
• Support needed
- BE/ABP/SU: coordination on geometry tests + data analysis and storage.
- All end users: coordination on design of quench antennas
(size and sensitivity of coils, geometry, compensation)
Instrumentation for Magnetic Measurements” [email protected]
Review of Superconductors and Magnet Laboratories, 19-20 May 2009
Page 5/7
Overlap
With
Magnet R&D
Magnetic Instrumentation for Magnet R&D – High field magnets
• Demands
Warm/cold magnetic testing & quench detection of dipole and quadrupole short models and prototypes
Support to cable testing facility: search coils, electronics for data acquisition … (useful for any SC-related R&D)
• Instrumentation
Existing instrumentation may or may not be adequate to the task (mainly depends on: magnet length, Ø aperture,
accuracy needed).
• R&D issues
- Anticryostats
- Quench antennas
- Adapted coil shafts/moles
- Vertical cryostat systems
Overlap with R&D for Upgrade Phase I
• Support needed
- To be told in advance of geometrical/field constraints … (long lead times for high precision coil and shaft
components)
Instrumentation for Magnetic Measurements” [email protected]
Review of Superconductors and Magnet Laboratories, 19-20 May 2009
Page 6/7
Magnetic Instrumentation for Magnet R&D – Fast-cycled magnets
• Demands
- Warm/cold magnetic testing and quench detection of short models and prototypes (up to 2 T/s, 4 T)
- Magnetic properties of iron yoke samples (magnetization curve + hysteresis and AC losses)
• Instrumentation
Standard magnetic measurements based on fixed coils.
Existing systems (routinely used on normal magnets) require wide apertures  likely to be inadequate.
• R&D issues
- Suitably dimensioned coils and/or moles and/or double stretched wire systems
Topics overlapping other SC/NC magnet programs:
-
Adapt acquisition to high-precision pulsed mode operation (  synergy with Linac 4)
High bandwidth measurements of eddy current effects (  synergy with Linac4, PS, CNAO)
Integral measurement in strongly curved magnets e.g. multiple-coil fluxmeter ( R&D done for CNAO)
Flexible control of standard split-coil permeameter with FDI/FFMM (  material properties routinely demanded
by many clients e.g. NC magnets, PS B-train, LHC experiments, CLIC, CNAO, MedAustron, ITER …)
• Support needed
- To be told in advance of geometrical/field boundary conditions …
Instrumentation for Magnetic Measurements” [email protected]
Review of Superconductors and Magnet Laboratories, 19-20 May 2009
Page 7/7