instrumentation for magnetic measurements” [email protected] review of superconductors and...

Instrumentation for Magnetic Measurements” [email protected] Review of Superconductors and Magnet Laboratories, 19-20 May 2009

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Superconducting Magnets and Laboratories:Superconducting Magnets and Laboratories:Instrumentation for Magnetic MeasurementsInstrumentation for Magnetic Measurements

M Buzio, L Walckiers on behalf of TE/MSC/MM staffM Buzio, L Walckiers on behalf of TE/MSC/MM staff

Superconducting Magnets and Laboratories:Superconducting Magnets and Laboratories:Instrumentation for Magnetic MeasurementsInstrumentation for Magnetic Measurements

M Buzio, L Walckiers on behalf of TE/MSC/MM staffM Buzio, L Walckiers on behalf of TE/MSC/MM staff

ContentsContents

1. LHC Spares2. Support to LHC Operation3. Support to LHC Operation4. LHC upgrade Phase I5. Magnet R&D – High Field Magnets6. Magnet R&D – Fast-Cycled Magnets


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Magnetic Instrumentation for LHC SparesMagnetic 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)


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Magnetic Instrumentation in Support to LHC OperationMagnetic 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 …

• InstrumentationStandard 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.


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FAME (FAst Measurement System) =FAME (FAst Measurement System) =

Adapted long coil shaft + Mobile Rotating Unit

Adapted long coil shaft + Mobile Rotating Unit

++ ++

PXI Fast Digital Integrators(~25 prototypes operational)PXI Fast Digital Integrators

(~25 prototypes operational)FFMM C++ software

(prototype version 3.0 deployed)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.

• 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.


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Magnetic Instrumentation for LHC Upgrade Phase IMagnetic 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)

• InstrumentationSingle 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)

Overlap

With

Magnet R&D

Overlap

With

Magnet R&D


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Magnetic Instrumentation for Magnet R&D – High field magnetsMagnetic Instrumentation for Magnet R&D – High field magnets

• Demands Warm/cold magnetic testing & quench detection of dipole and quadrupole short models and prototypesSupport to cable testing facility: search coils, electronics for data acquisition … (useful for any SC-related R&D)

• InstrumentationExisting 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

• Support needed- To be told in advance of geometrical/field constraints … (long lead times for high precision coil

and shaft components)

Overlap with R&D for Upgrade Phase IOverlap with R&D for Upgrade Phase I


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Magnetic Instrumentation for Magnet R&D – Fast-cycled magnetsMagnetic 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)

• InstrumentationStandard 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...

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