Insertion Devices

1 BROOKHAVEN SCIENCE ASSOCIATES

Insertion Devices

Toshi TanabeInsertion Device Group Leader

Accelerator System Advisory Committee October 22-23, 2009


Outline

• Changes / Progress since last ASAC ID review • ID Table / Official Schedule • Progress on Each Device• R & D (PrFeB, IVMMS, 4m Square Chamber)• FY10 Goals and Milestones• Conclusions


Changes since ASAC07

• PCR to reschedule (pushed later due to labor shortage) some activities in 1.02.01.03 & 1.03.08.02

• PCR approved to add SRX beamline device (1.5m IVU with 21mm period) with canting magnet and vacuum chamber for the second device section

• Additional IVUs requested to be added to the baseline• For IXS beamline (2 x 3m IVU with 22mm period having wider pole)

• Additional IVUs might be added to outside the project baseline• 2-3 IVUs for NIH funded beamlines• 6-7 MIE devices (specs not decided)


Progress since ASAC07

• Technical Status of Systems• PM Damping Wiggler (DW) Design and Build Contract with APS• In-Vacuum Undulator (IVU) Mechanical design started• Elliptically Polarized Undulator (EPU) Specs determined• Three Pole Wiggler (3PW) Interraction study on going• Magnet Development Laboratory (Insertion Device Magnet Measurement Facility)

Hall probe bench purchased, Clean room RFP completed.

• New Hires• A Mechanical Engineer (0.9FTE: starting on 11/08) • An Electrical Engineer (0.8FTE: starting on 04/09)• One Mechanical Technician (T6) position open• One Assistant Scientist (S1) position open• One Electrical Engineer (P5) position open


NSLS-II Insertion Devices (SEP/09)

*For each plane


PCR required

PCR required


Damping Wiggler

• NdFeB-PM with Side Magnets and Permendur Pole (width 80mm),u=90mm, Gap=12.5mm, Symmetric magnetic field• Vacuum Chamber (APS type? ), Aperture Size 9.5mm (v) x 76mm (h)

Symmetic Field with 37 Full Strength Periods

Conceptual Design


APS Proposal

• Similar concept as LSLS undulator

•CAD Model


NSLS-II In-Vacuum Undulator• X25-MGU based IVUu=20mm, Minimum Gap=5.0mm, 3m Long• Baseline design uses conventional NdFeB (Br=1.12T, Hcj=30kOe)• Future cryo-option with PrFeB Magnet• Cold Measurement System is being developed for CPMU mode• Vacuum Chamber shape still undecided (Square v.s. Cylindrical)

NSLS MGU-X25 Opera 3D Simulation


Elliptically Polarized Undulator (EPU)

• Apple -II, u=49mm, 2x2m Long (canted -0.125mrad:0.25mrad:-0.125mrad)• Gap=11.5mm (Enough space for current strips for dynamic multipole correction)• Vacuum Chamber Aperture Size 8.0mm (v) x 61mm (h) (tentative)

Linear Helical

Vertical45°Inclined


Three Pole Wiggler (3PW) (WBS1.03.07.04)

•Br=1.22T, Permendur Center Pole & Soft Iron (1006) Side Poles•Rectangular Magnets•Insert / Extract from a side of the chamber

•Design (Central Pole Gap=28mm)

•ACD Design


TPW Estimated Emission Spectra(taking into account contribution from Bending Magnets)

Electron Energy: 3 GeV; Current: 0.5 A; Emittance: 0.9 nmRel. Energy Spread: 8.9x10-4 Twiss Parameters of Dispersion Section (end)

Spectral Flux per Unit Surface at Different Horizontal Positions at 30 m from TPWSpectral Flux per Unit Surface at Different Horizontal Positions at 30 m from TPW


35 mm Dipole

3 Pole Wiggler

156mm Corrector

225mm 200mm

Interaction Study for 3PW, Corrector and Dipole Magnet

Electron Beam


ID Tolerance Requirement (SEP/09)

SLS Alba ESRF SOLEIL NSLS-II(DW) NSLS-II (Und)By First Integral [G.cm] 20(<1cm) 30 40 20 50 5Bx First Integral [G.cm] 7 40 30 5By Second Integral [G.cm.cm] 10000 6000 10000 10000 10000 3000Bx Second Integral [G.cm.cm] 600 10000 5000 300Normal quadrupole [G] 50 50 50 70 50 50Skew quarupole [G] 50 5 50 70 50 50Normal sextupole [G/cm] 60 20 60 30 100 100Skew sextupole [G/cm] 60 20 60 100 100Normal octupole [G/cm/cm] 100 10 150 20 100 100Skew octupole [G/cm/cm] 100 10 50 50

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•Insertion DeviceIntegrated Multipoles

Unit 230 /,,,, cmGbcmGb IDID

•1st & 2nd Integrals


Feedback onFeedback off

ID at Short straight section at 80 m with kicks at the ends vertically corresponding to ID with correction coilsI1=5 Gauss.cm , I2=300 Gauss.cm2 , for one sample.

100 200 300 400 500 600 700zm

2015105

5101520ym

70 80 90 100 110 120zm

8642

2468

ym

100 200 300 400 500 600 700zm

1.5

1

0.5

0.5

ym

75 80 85 90 95 100zm

2

1.5

1

0.5

0.5

1

1.5

2ym

100 200 300 400 500 600 700zm

2015105

5101520ym

70 80 90 100 110 120zm

8642

2468

ym

100 200 300 400 500 600 700zm

1.5

1

0.5

0.5

ym

75 80 85 90 95 100zm

2

1.5

1

0.5

0.5

1

1.5

2ym

100 200 300 400 500 600 700zm

2015105

5101520ym

70 80 90 100 110 120zm

8642

2468

ym

100 200 300 400 500 600 700zm

1.5

1

0.5

0.5

ym

75 80 85 90 95 100zm

2

1.5

1

0.5

0.5

1

1.5

2ym

Detail near ID, Feedback on

100 200 300 400 500 600 700zm

2015105

5101520ym

70 80 90 100 110 120zm

8642

2468

ym

100 200 300 400 500 600 700zm

1.5

1

0.5

0.5

ym

75 80 85 90 95 100zm

2

1.5

1

0.5

0.5

1

1.5

2ym

Feed Back Estimate (by L.H. Yu)


Magnet Development Lab (WBS1.02.01.03)Insertion Device Magnetic Measurement Facility (WBS 1.03.08.02)

• ISO 14644-1 Class 7 (former Class 10000) Temperature Controlled Semi-Clean Room for IVU Measurement

• 25.5 °C ± 0.2 °C < 20 °C for IVU Array cooling water, 25.5 °C for tunnel temp, and 28 °C for genetic cooling water

• Low vibration required by pulsed wire measurement• Cleanliness is also required for air-bearing stage in Hall probe bench

• Standard ID measurement setups• 6.5 m Hall probe bench (Kugler) • Integrated Field Measurement System (Flip coil, Moving wire, etc. )• Stretched / pulsed wire system (3-4m) HV pulser for pulsed wire.• Magnet characterization equipment (Helmholtz coil / small moving coil)• 3D-Probe calibration system with a dipole magnet (PS ~ 200A / 80V)

• Preparation for Phase-2 device development• In-Vacuum measurement apparatus• Superconducting measurement apparatus


Bldg. 832 3D-Layout

Pulsed Magnet LabRF Lab

ISO-7 Clean Room for MeasurementID Lab

Tech Shop


Insertion Device R&D

• Remaining R&D activities • In-Vacuum Hall probe measurement system• Square UHV-ID chamber development• Improved pulsed wire system development• PrFeB array test in VTF with re-circulating refrigerator

• Possible Additional Future R&D activities • SCU development (APC wire, HTS tape and bulk HTS)• Micro multi-turn coils development• Textured Dy pole development


PrFeB Magnet 77K Measurement

• PrFeB (53CR v2 magnet) Manget Arrays• Cut from a large piece M vector uniformity is poor Sorted by signature method • Period Length = 14.5mm, Gap=4.85mm• RT measurement on granite Hall probe bench (Gap=4.85mm) for references• RT & LN (77K) measurement on VTF

•Increase of ~19 % in Br


PrFeB H v.s. M at 77K Measured by SQUID


Phase Error Change from RT to LN2 temp.

•RMS Phase Error = 3.1 degree


u = 14.503 mm u = 14.489 mm


Phase Error Change from LN2 to LHe temp.



u = 14.489 mm u = 14.433 mm

Hall Probe Output Voltages


4m Square UHV Proto Type (Preliminary)• 4m Square UHV Chamber

• Test of sealing, deformation• Either Aluminum or 316LN• Will be mated to IVMMS for testing• Impedance Effect OK


FY10 Goals & Milestones

• DW Detailed Design

• Set up a Clean Room and Hall Probe Bench in Bldg. 832

• Procure or Develop Wire Based Integrated Field Measurement System

• Proto Type In-Vacuum Magnetic Measurement System (IVMMS)

• Proto Type 4m Square UHV Chamber

• Proto Type ID Control HW Test


ID-Group FTE Profiles in the Baseline Budget

Category 2009 2010 2011 2012 2013 2014

Scientist (T.Tanabe, O.ChubarAssigand S1) 1.3 2.0 2.2 2.2 1.5 1.0

Mechanical Engineer (J.Rank, C. SpataroAssig) 1.4 1.5 1.5 1.5 1.0 0.5

Electrical Engineer (D.A.Harder and P5) 0.8 1.5 2.0 2.0 2.0 0.5

Mechanical Technician(T6) 0.2 1.0 1.0 1.0 1.0 1.0

Total 3.7 6.0 6.7 6.7 5.5 3.0


Summary

• IVU• Design effort starts with SRX-IVU• Transition region design is unconventional due to adjacent small gap for ID-BPM• Long Straight IVU not trivial

• EPU• Active shimming with current strips are being investigated.

• Damping Wigglers• Negotiations of design and build contract with APS continue

• 3PW• Only Design budget is in the baseline budget. Need to create PCR to construct a proto type

• R&D and Future Devices• IVMMS design continues• 4m Square vacuum chamber design continues• PrFeB CPMU will be very promising candidate for next generation undulator

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Insertion Devices