-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
1/36
presented by Brett Parker, BNL-SMDpresented by Brett Parker, BNL-SMD
BNL Direct Wind Magnets*BNL Direct Wind Magnets*
*In memory of Pat Thompson*In memory of Pat Thompson
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
2/36
Outline: BNL Direct Wind Magnets
Overview production process and terminology.
Coil Winding, Wrapping, Measurement, and Curing
Planar Patterns versus Serpentine Coils
Multifunction, Multi-Layer Coils and Field Quality
.
ILC QD0 R&D Prototype and ATF2 Upgrade Magnets
Experience from Alpha (anti-hydrogen trap), HERA-IIand BEPC-II IR Magnets, and JPARC Correctors
eRHIC Final Focus Septum Magnet
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
2
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
3/36
10 Basic Steps for Winding BNL Coils
1. Support tube is wrapped with epoxy substrate.
2. Insulated conductor with epoxy coating pays outunder stylus (7-strand cable or single strand).
3. Ultrasonic heating tacks conductor temporarily in
place (i.e. rapid cooling after stylus moves on).4. Coordinated motion: tube rotation, linear speed,
angle-of-attack, stylus pressure, power etc.
5. Fill gaps in pattern with G-10 (or Nomex) & wet
ILC QD0
Production
.
6. Then tension wrap with fiberglass for pre-stress.
7. Do a high temperature cure of the coil structure.
8. Occasionally we will machine coil on a lathe toensure that the outer coil surface is round.
9. For best field quality, measure harmonic contentof coil layers wound so far and prepare to makecorrections to harmonics in later layers.
10.As needed go back to step 1.
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
3
Octupole CoilTest Winding
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
4/36
HERA-II Production Overview
ctWin
d,
ctWin
d,
Days
Days
15 September 2011 BNL Direct Wind Magnets,
Brett Parker, BNL-SMD4
BNLDire
BNLDire
Th
eEarl
Th
eEarl
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
5/36
Planar patterns impact direct windcoil production in multiple ways
15 September 2011 BNL Direct Wind Magnets,
Brett Parker, BNL-SMD5
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
6/36
The BEPC-II IR Magnet Design
15 September 2011 BNL Direct Wind Magnets,
Brett Parker, BNL-SMD6
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
7/36
Initial BEPC-II: Look to go out of planeand wind dual-layer planar patterns.
15 September 2011 BNL Direct Wind Magnets,
Brett Parker, BNL-SMD7
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
8/36
BEPC-II Special Feature: Local BES-IIIDetector Solenoid Compensation Scheme
8 layers
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
8
Local Compensation
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
9/36
BEPC-II Quadrupole (SCQ) Winding
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
9
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
10/36
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
11/36
Some Coil Topology Considerations
With Serpentine patternswe are able to bring leadpairs out without usingany extra radial space
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
11
A JPARC coil option hadskew-quad leads brought
past the dipole and quadcorrection windings to fitinside main dipole coil.
Start lead is broughtout from layer #1
Lead Pair
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
12/36
JPARC Corrector Design Summary
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
12
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
13/36
Real coils: fillers, s-glass wrap, powerleads, volt taps and sometimes heaters.
G10 StabilizedLead Pair
Stycast AluminaEpoxy Filling
17 August 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
13
The means to put s-glass prestress wrap on long thin tubes. And More!
Wrapper puts onand takes off at
same time
... for no netpull of long thincoil support tubes.
HeadDetailHeadDetail
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
14/36
Alpha Antihydrogen Trap
CERNCOURIER
17 August 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
14
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
15/36
QD0 and the ILC Experimental Detectors
1 IR & 2 Push-Pull Detectors
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
15
QD0 sits inside the ILD (3.5 T) & SiD (5.T) detectors.
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
16/36
Design for Compact SuperconductingMagnet Used in the ILC 14 mr Layout.
14 mr crossing angle via compactself-shielded QD0 coil windings.
Extracted beam passes just outside
coil into separate focusing channel. Cryostat to fit within limited space
inside detector at L* = 3.5 to 4.5 m.
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
16
QD0 with active shield on/off
On Off
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
17/36
Magnetic Measurements & Field Quality
When we need to meet the mostdemanding field quality goals ina multilayer coil, we make warmharmonic measurements aftereach coil set is completed andQuad Stack
subsequent coil sets based uponthese intermediate results.
A good example is the ATF2
superconducting upgrade finalfocus magnet coil production.
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
17
All 3 coilsets nowcomplete
ATF2 Production
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
18/36
Summary of Integral Field Quality in ATF2 Magnet
We calculated harmonics for Rref = 10 mm
to compare to the present ATF2 magnets.
The poorest quad harmonics (b3,a3), are
only 49. parts per million.
The areas highlighted in blue are all
smaller than 200 arts er billion.
ATF2Coils
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
18
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
19/36
A Combined Function Magnet Trick.
Observe the following genericbehavior of the field with coildominated magnet geometry,the field strength reversescrossing the coil structure and
2 August 2011 eRHIC IR Magnet Designs,Brett Parker, BNL-SMD
19
.
Thus on one side the combined external field isenhanced but on the other side the fields tend to
cancel; with a careful choice of relative strengthsand polarities we can create a low field region justoutside the coil structure for the e-beam to pass.
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
20/36
Design Details for First IR Magnet
Dipole & Quadrupole Coil Sets
Low field region
Region used by circulatinghadron beam Neutrons
Magnet structure is aligned with e-beam.
Magnet offset is optimized for neutrons,circulating beam and early analysis for off-
momentum charged particle measurement.
2 August 2011 eRHIC IR Magnet Designs,Brett Parker, BNL-SMD
20
Peak field is 6.2 TPlot of |B| (Tesla) for the Coil Structure
or e- eam
Bo = 2.701 T
Gradient = -85.74 T/mand Lmag = 1.95 m
MagneticYoke
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
21/36
Reduced Field Region for e-Beam
Even with 6.2 T coilpeak field and 2.4 T,|B|max in the outer
yoke, the field insidethis shielded region isa fraction of a Gauss.
2 August 2011 eRHIC IR Magnet Designs,Brett Parker, BNL-SMD
21
Plot of |B| (Tesla) for the Yoke and Two Layer Shield Structure
Insert Plot for |B| x104
0.28 Gauss 0.36 Gauss
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
22/36
BES-III: Peak Field in IR Quad Coil*
ak
fieldca
lculation
is
lped
turn
bring
my
idea
tofr
uition.
15
Septe
mber2011
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
22
*Pat Thompson is primary author of the codes, Wire2Dopt, WireEndOpt, FlatPatternGen,SerpentineGen, Coilfield, CoilPlot and CoilForce among with many other BNL codes.
This
BEPC-II
pe
one
way
Pat
h
cra
zy
Serpentine
B.Parke
r
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
23/36
How far will we take BNL Direct Wind?How far will we take BNL Direct Wind?
ILC DID
17 August 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
23
Adieu Pat.Adieu Pat.
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
24/36
Extra Slides
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
24
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
25/36
IR Configuration for eRHIC
eRHIC IR Magnets for HadronsDownstream (Electrons Upstream)
Critical magnets withrequirements coming
from both acceleratorand detector physics.
Electron beam
15 September 2011 eRHIC IR Magnet Designs,Brett Parker, BNL-SMD
25
Look to bring e-beam to IP while keeping strong bends faraway (minimize Synrad related backgrounds).
Provide good experimental acceptance and separateneutrons and other off-momentum charged particles from theoutgoing hadron circulating beam.
rect on
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
26/36
First IR Magnet Considerations
Must provide low-field region, 10 mr awayfrom hadron beam, for incoming e-beam.
Strong beam focusing + large solid angle
for detection superconducting magnet.
For compact optics solution with tailoreddeflection and separation of off-momentum No e 4.5 m *
2 August 2011 eRHIC IR Magnet Designs,Brett Parker, BNL-SMD
26
particles
use combined function magnet.
Above implies fairly high coil peak fields (at least
compared to iron saturation); how can we create a lowfield pocket for the e-beam to get to the IP?
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
27/36
eRHIC Magnet 2D and 3D Field Profiles
3D Coil Pattern
2 August 2011 eRHIC IR Magnet Designs,Brett Parker, BNL-SMD
27
, ,
X Ranges from 22. to -0.67 mm, (Y=0 mm)
IP End
Non-IP End
Initial angle is -10. mr (w.r.t. electronbeam) and exit angle is -14.0 mr.
Average B is 1.73 T for4 mr added deflection
3D field is calculated viarescaling of the bare coilsusing the 2D results. For
final design we need fullcalculations and to optimizethe shielding to take intoaccount end-field effects.
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
28/36
Summary of Integral Field Quality in ATF2 Magnet
ATF2Coils
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
28
Harmonics are in "Units" of 10-4 of the main field at 25 mm as
seen from the lead ends of respective magnets (yieldingopposite sign of field angle in the two magnets). I.T.F forQuadrupole is in T/kA; ITF for Sextupole is in T/m/kA (Integralof B" in sextupole is two times the value reported for the I.T.F).
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
29/36
ILC R&D Prototype and ATF2 Comparison
ATF2 Upgrade Magnet
Both are compatible with 1.9K testing via
an ILC-style Service Cryostat (SC) at BNL.
The ATF2 magnet can be tested with beam;
there is no way to beam test R&D prototype.
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
29
(concept test with beam)
ILC QD0 Full-Length R&D Prototype Magnet Program(a full-scale, instrumented, 1.9K ILC SC, systems test)
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
30/36
ILC 14 mr Crossing Angle Magnet Details
QD0 Coils in Opera3d
The QD0 magnet cryostat
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
30
contains multiple activelyshielded quadrupole coils,
with sextupole and octupole
coils, many correction coils
plus an adjustable force-neutral anti-solenoid.
C t t b d di S ti t
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
31/36
Constant bend radius Serpentine turnsfor integral harmonics identical to 2D
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
31
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
32/36
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
33/36
Final SCB Serpentine Coil Pattern.
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
33
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
34/36
BEPC-II Design Details
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
34
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
35/36
HERA-II Cryostat Design Summary
15 September 2011 BNL Direct Wind Magnets,Brett Parker, BNL-SMD
35
-
8/12/2019 Brrokshaven National Lab 4FO 6 Parker BNL Direct Wind Magnets
36/36
reallyThis ^is the last slide,
Adieu.
36