Magnets Technologies for

NOνA Transfer Line(& RR30 section)

July 21-23, 2009

Magnet Count Summary

Type CommentTotal

RequiredFrom

Tunnel

AvailableFrom

StorageConstruct

NewModify

Existing

RQNx Recycler style 20 in. permanent magnet quad48 44 5 0 All

Somewhat

PDS New SmCo5 style double dipole 2 0 0 2 0

PDD PDD 8 Gev style double dipole, existing style 5 0 0 5 0

PDDW PDD dipole design, reduced field 2 0 0 2 0

MGS Recycler dispersion suppressor mirror magnet 2 1 1 0 0

ADCW Modified B1 style to open aperture 3 0 0 0 3

MLAW MI style injection Lambertson, new, modified 2 0 0 2 0

ILA MI style Lambertson 1 1 0 0 0

MQT Old MR style quad trim 23 10 13 0 0

HDC Old MR style horizontal corrector used in Recycler 8 8 0 0 0

VDC Old MR style vertical corrector used in Recycler 9 9 0 0 0

MCH LEP Horizontal corrector 2 2 0 0 0

MCV LEP vertical corrector 2 2 0 0 0

Where are they coming from?

• Existing magnets available from tunnel or storage– MGS, RQNx (re-measure, re-trim)

• New construction of existing designs– PDD

• New constructions of modified designs– MLAW, PDDW

• Modification of existing magnets– ADCW

• New construction of new design– PDS

Permanent Magnet Quadrupoles (RQN)

• Modification of existing RQM’s• Need 48; including spares 49 are

available• Issues to be addressed

– It will be necessary to re-trim and re-measure all

– R&D has occurred and will continue relating to trimming measuring, and brick magnetization

– The R&D effort on spares is being used to get us back in the “permanent magnet business”

Permanent Magnet Quadrupoles (RQN)

NEED HAVELoc T-m/m location S/N T-m/m % Diff301-1 0.849964 v Q301B1 RQMH001 1.021386289 16.8%301-2 0.849964 v Q301B3 RQMH003 1.021386289 16.8%309-1 0.849964 v Q301B2 RQMH007 1.021386289 16.8%309-2 0.849964 v Q303A1 RQRMH002 1.021386289 16.8%305-1 0.928994 v Q303A3 RQRMH004 1.021386289 9.0%305-2 0.928994 v Q303A2 RQRMH006 1.021386289 9.0%305-3 0.928994 v Q307C RQMG002 1.116112784 16.8%853-1 0.95951 v Q305C RQRMG001 1.116112784 14.0%853-2 0.95951 v TPL RQMB002 1.12578 14.8%853-3 0.95951 v TPL RQMB001 1.1258 14.8%850-1 0.997255 h Q305B1 RQRB001 1.200334866 16.9%850-2 0.997255 h Q307B1 RQRB002 1.200334866 16.9%850-3 0.997255 h Q307B3 RQRB003 1.200334866 16.9%303-1 1.006323 v Q305B2 RQRB004 1.200334866 16.2%303-2 1.006323 v Q307B2 RQRB005 1.200334866 16.2%303-3 1.006323 v Q305B3 RQRB006 1.200334866 16.2%307-1 1.006666 v Q302C4 RQRE001 1.24743603 19.3%307-2 1.006666 v Q302A4 RQRE002 1.24743603 19.3%307-3 1.006666 v Q302C1 RQRE003 1.24743603 19.3%849-1 1.037336 v Q302A2 RQRE004 1.24743603 16.8%849-2 1.037336 v Q302C2 RQRE005 1.24743603 16.8%849-3 1.037336 v Q302A3 RQRE006 1.24743603 16.8%302-1 1.059978 h Q302C3 RQRE007 1.24743603 15.0%302-2 1.059978 h Q302A1 RQRE008 1.24743603 15.0%302-3 1.059978 h Q302C5 RQRE009 1.24743603 15.0%308-1 1.059979 h Q302A5 RQRE010 1.24743603 15.0%308-2 1.059979 h TPL RQMD011 1.28268 17.4%308-3 1.059979 h IB2 RQMD001 1.28368 17.4%304-1 1.185182 h Q302B1 RQRF001 1.284516279 7.7%304-2 1.185182 h Q302B2 RQRF002 1.284516279 7.7%304-3 1.185182 h Q302B3 RQRF003 1.284516279 7.7%306-1 1.185196 h Q302B4 RQRF004 1.284516279 7.7%306-2 1.185196 h Q302B6 RQRF005 1.284516279 7.7%306-3 1.185196 h Q302B5 RQRF006 1.284516279 7.7%851-1 1.18552 v Q701-1 RQMD021 1.2862 7.8%851-2 1.18552 v Q701-2 RQMD022 1.2862 7.8%851-3 1.18552 v Q702 RQMF009 1.3345 11.2%801 1.286181 v Q806 RQMF022 1.3345 3.6%803-1 1.286181 v Q304A1 RQRC001 1.390516869 7.5%803-2 1.286181 v Q304A2 RQRC002 1.390516869 7.5%852-1 1.289152 h Q308A2 RQRC003 1.390516869 7.3%852-2 1.289152 h Q308A1 RQRC004 1.390516869 7.3%804-1 1.28969 h Q303B RQRD001 1.390516869 7.3%804-2 1.28969 h Q305A1 RQRD002 1.390516869 7.3%805-1 1.330403 v Q305A2 RQRD003 1.390516869 4.3%805-2 1.330403 v Q307A2 RQRD004 1.390516869 4.3%802-1 1.3345 h Q307A1 RQRD005 1.390516869 4.0%802-2 1.3345 h Q309A RQRD006 1.390516869 4.0%

TPL RQRA040 1.39077 EXTRA

RQMD001 Trim Tests

1.2200

1.2300

1.2400

1.2500

1.2600

1.2700

1.2800

1.2900

1.3000

0 50 100 150 200 250

Washer Load160=~2/3 full

T-m

/m

94.0%

95.0%

96.0%

97.0%

98.0%

99.0%

100.0%

% o

f ful

l stre

ngth

Strenght v Washers

% from no w ashers

RQRA040

1.33

1.34

1.35

1.36

1.37

1.38

1.39

1.4

1.41

1.42

1.43

1.44

0 50 100 150 200 250

Washer Load230=~full

T-m

/m

93.0%

94.0%

95.0%

96.0%

97.0%

98.0%

99.0%

100.0%

% o

f ful

l stre

ngth

Strenght v Washers

% from no w ashers

PDS• Why a new dipole?

– Need to fit a dipole in an area with small beam separation

– Build a magnet with SmCo5 (stronger) instead of Strontium Ferrite

• Issues– New design– Industry will build a small

prototype. From this we will establish the design parameters of the final magnet

Injection Line

847

To Recycler

848

MI8

849

PDS

Vertical switching magnet8 Gev line

V2 (PDD)

PDS

• Many different designs considered

• Separation of only~6.25” between MI-8 and RRInj beam centers

• Must have 2’’x4’’ aperture for beam pipe.

• Need 2.312kG vs. 2.167kG of PDD

Integrated strength, T-m 0.6

Center field, T 0.24

SmCo5 residual flux density Br, T 0.86

SmCo5 coercive force Hc, kA/m 662

Air gap, mm 52

Magnet length, m 2.5

Magnet width, mm 270

Magnet height, mm 160

Volume of SmCo5, cu. inch 600

Cost of PM material, $ (at 31$/inch3) 18,600

PDS

PDS•Stretched wire, and rotating coil measurements of strength performed.•Temperature dependence measurements completed•Analysis underway•Internal Design Review expected in August 09

PDD

• Injection line requires 5 new magnets

• Existing design, tooling, procedures and measurement– Not used for 10

years– Needs

refurbishment

PDD

PDDW

• Modification to PDD dipoles• ~10% of the ferrite bricks (and the corresponding

compensator) will be replaced with aluminum blocks (and strips).

• Will require more tuning than the PDD dipoles. • Sufficient strontium ferrite bricks and compensator

material exists.

MGS

•One in the tunnel and one in storage•Will need to be measured

• Vertical Bend Dipoles (ADCW)– Injection line – 1 each– Extraction line – 2 each– Rebuild old 8GeV line dipole with ~3/4’’ spacer in back

leg to open gap.• More than enough magnets have been found.• The beamline design has been optimized such that

heat load and field leakage issues are not a concern.• For a ~33mr bend will run at <700 Amps

ADCW

ADCW

•Laser cutting of spacer lamination would have been cheaper, however specification were not achieved. Stamping is necessary•Vendor stamping of laminations underway (samples expected soon)

•Coils on old ADC’s were found to be unsecured. This will be address in the modification

ADCW ModelingFractional By @ y=0

-50.000

-40.000

-30.000

-20.000

-10.000

0.000

10.000

X (in)

pp 1

0k Normal gapWide gap

Fractional By @ y=1cm

-50.000

-40.000

-30.000

-20.000

-10.000

0.000

10.000

X (in)

pp 1

0k Normal gapWide gap

•For ~33mr the magnet needs to run ~670 Amps•ADC has run in this range. •An unmodified ADC has been measured

ADCW Modeling

•We have identified a power supply sufficient for 15hz magnet testing purposes, and plan to measure the first magnet at a 15hz pulse rate.

•Measurement of the 1st modified ADCW is expected ~ October 2009

MLAW

•Rotated/Modified Lambertson•5-6 mm gap increase will increase the current requirements by14% over the smaller aperture•The required bend, however, will be ~14mr (40% of current bend)•The new Lambertson will need to run ~430Amps (currently runs at ~950Amps)

Circulating Beam

Injected Beam (upstream/Lambertson end)

Injected beam (downstream/RR beampipe end)

With a modified MLA

Solid lines: 6Dashed lines: 10

MLAW

• Two (2) MLAW Lambertson magnets, one for the Recycler injection line and one for the RRMI30 transfer line will be fabricated

• These will be a modified version of the magnet currently used for injection from MI‑8 to the Main Injector.

Spacers to increase

MLA MeasurementsIntegrated Strength

0

0.2

0.4

0.6

0.8

1

1.2

0 200 400 600 800 1000 1200

Measured Current (Amps)

Inte

grat

ed S

treng

th (T

-M)

•In the range we will be running the Lambertson, (~430A) the field strength is linear

•MLA002 has had stretched wire measurements of strength and field shape

•Summary of MLAW vs MLA model in NOvA docDB doc 3155 (https://nova-docdb.fnal.gov:440/cgi-bin/ShowDocument?docid=3155)

Conclusions

• No new “groundbreaking” work will occur. Most work consists of modifications of existing magnets or new fabrication of magnets which are either existing designs or modifications to existing designs (MLAW, PDDM, and PDDW) .

• Working with spare permanent magnets will continue to refresh “forgotten” permanent magnet knowledge

• Fabrication of magnets with SmCo5 can be tricky, but industry has experience with them. Currently we are testing a prototype in order to finalize a production design