Accelerator Division - Brookhaven National Laboratory Division BROOKHAVEN SCIENCE ASSOCIATES Synchrotron Radiation Protection Task Force 2 NSLS-II Synchrotron Radiation Protection

BROOKHAVEN SCIENCE ASSOCIATES1

P.IlinskiSynchrotron Radiation Protection

NSLS-II ASAC Review October 14-15, 2010

Accelerator Division

BROOKHAVEN SCIENCE ASSOCIATES

Synchrotron Radiation Protection Task Force

2

NSLS-II Synchrotron Radiation Protection Task Force was initiated by ASD Division Director F. Willeke on 07/26/2010

A task force is herewith initiated to assure an overall integrated design of Synchrotron Radiation Protection

StakeholdersASD Management, Ferdinand Willeke, Erik JohnsonASD Accelerator Physics Group, Samuel KrinskyASD Instrumentation Group, Om SinghASD Safety Systems Group, Erik JohnsonASD Vacuum Group, Dick HseuhASD Mechanical Engineering Group, Sushil Sharma

Task Force MembersTask Force Leader: Petr Ilinski The following scientists and engineers are standing members: Scott Buda, ASD Electrical Engineering GroupJinhyuk Choi, ASD Acc. Phys. GroupMarcelo Ferreira, ASD Vacuum GroupIgor Pinayev, ASD Acc. Phys., GroupViswanath Ravindranath, ASD Mechanical Engineering GroupYong Hu, Controls GroupOleg Tchoubar, XFD


SRP TF Goals and Deliveries

3

• Define the limits for the beam positions and angles which protect the accelerator components from destructive synchrotron radiation and which leaves sufficient room for residual beam motion to assure stable and reliable operations

• Define the detection system which measures the beam position and angle• Define the requirements for the equipment protection interlock system which will

assure that the high intensity ID radiation will not damage vacuum system components

• Assure that when the electron beam orbit moves outside the allowed range, the interlock system will kill the beam within a short enough time interval to prevent damage

• Define a procedure for checking that vacuum system hardware is properly positioned• Define a procedure based on observation of the ID radiation at low electron current to

calibrate the BPM offsets relative to the position of the vacuum system hardware• Define a procedure for testing that the interlock system is engaged and properly

functioning• Define interfaces between the equipment protection system and the personal

protection system• Write a report with the specific requirement on the equipment protection system • Draft any PCR to cover additional cost of analysis, prototyping and final system cost

Charge for SRP TF:


SRP Oversight

• Passive protection from Dipole Radiation• Full passive protection

• Envelopes for particular cases• Damping Wiggler• IVUs• EPUs• Dipole (25, 100, 500 mA)

• Transient Analysis• Maximum safe operation current• Maximum beam dumping time

• Active Interlock• Envelope• Specifications• Architecture• Operation

4


Envelopes

• Stay Clear Envelope• defines e-beam phase space for Stay Clear Operation• radiation fan does not hit machine elements even in case of misalignment

• Safe Envelope• defines e-beam phase space for Safe Operation• Safe Operation satisfies Steady State operation conditions

– less then 100C for aluminum vacuum chamber

• Active Interlock Envelope• AI Envelope = Safe/StayClear Envelope - Total uncertainty• Total uncertainty = BPM alignment, drifts etc• beam will be dumped once it is outside the AI Envelope

• Geometrical Envelope• Geometrical Envelope is defined by boundaries of the vacuum chamber

• Beam Acceptance• phase space of maximum beam acceptance of close orbit• provides initial conditions for the Transient analysis

– estimation of maximal time to dump the beam– estimation of maximal safe operation beam current

5


Envelopes

6

Geometrical Envelope

Safe Envelope

mm

mrad

Stay Clear Envelope

Beam Acceptance

Beam

AI Envelope


Stay Clear Envelope

7

Stay Clear Envelope

Mechanical Tolerances

Radiation fan

101

102

103

104

105

Inte

grat

ed P

ower

[W]

-4.0mrad -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0 4.0

Horizontal [mrad]

-0.8mrad -0.6 -0.4 -0.2 0.0 0.2 0.4 0.6 0.8Vertical [mrad]

DW Itegrated Power vert. direction (top axis) hor. direction (bottom axis)

Damping Wiggler Integrated Power


Stay Clear Envelope - BPMs

8

Mechanical Tolerances/Alignment = 1.5mmVert. Beam Divergence = +/- 0.6 mrad

DW vacuum chamber:ymax=5.75mm-1.5mm-0.6mrad x 3.8m = 1.85 mmy’max=1.85 mm / 3.8m = 0.49 mrad

y’max

ymax

2L=2x3.8m

11.5m

my1

y2

yy’

y=(y1+y2)/2 y’=(y2-y1)/2Lymax

|y1|<ymax OR |y2|< ymax

ymaxymax


Stay Clear Envelope - DW Vacuum Chamber

9

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11

0.125

0.25

0.375

0.5

0.625

0.75

0.875

1

y [mm]

y’ [m

rad]

Vacuum Chamber Inner size = 2x5.75mm

Inner size-Mech.Tolerance = 5.75-1.5mm

Vacuum Chamber Geometrical Envelope


Stay Clear Envelope - DW Vacuum Camber

10

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11

0.125

0.25

0.375

0.5

0.625

0.75

0.875

1

y [mm]

y’ [m

rad]

Beam Vertical Divergence= 2x0.6mrad


Stay Clear Envelope - DW Vacuum Camber

11

Stay Clear Envelope - Vacuum Chamber

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11

0.125

0.25

0.375

0.5

0.625

0.75

0.875

1

y [mm]

Active Interlock Envelope - Vacuum Chamber

y’ [m

rad]


Power Density - Initial Beam Parameters

12

y’ [m

rad]

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11

0.125

0.25

0.375

0.5

0.625

0.75

0.875

1

1.125

1.25

1.375

1.5

y [mm]

Initial Beam Parameters for Power Density Calculations

Stay Clear Envelope - Vacuum ChamberActive Interlock Envelope - Vacuum Chamber


Steady State Thermal Analyses of Aluminum Chamber

Temperature Distribution

V.Ravindranath, O.Tchubar100 mm period Damping Wiggler

Beam Deviation: 0.5 mrad / 0mm Tmax = 56 °C

Convection Boundary Conditions:Water Temperature: 25 °CFilm coefficient: 0.015 W/mm2 °C

-2m

0

2

Ver

tical

Pos

ition

-20mm -10 0 10 20Horizontal Position

0.01 0.009 0.008 0.007 0.006

0.005 0.004 0.003

0.002

0.001

Power Density Distribution

[W/mm2]


Temperature Rise - DW vacuum chamber

14

Source ElementElement Length

Element misalign

ment [upstr.]

Element misalign

ment [downstr.]

CaseBeam

[Transl]Beam

[Angle]Peak

TemperaturePeak Power

Density Power

m mm mm mm mrad Deg C W/mm^2 W 1

2xDW100 DW vac. chamber 7.6 -1.5 -1.5 Steady 0.5 0 28 1.1E-03 40 2

2xDW100 DW vac. chamber 7.6 -1.5 -1.5 Steady 1 0 30 1.8E-03 68 3

2xDW100 DW vac. chamber 7.6 -1.5 -1.5 Steady 1.5 0 33 3.2E-03 124 4

2xDW100 DW vac. chamber 7.6 -1.5 -1.5 Steady 2 0 41 6.2E-03 245 5

2xDW100 DW vac. chamber 7.6 -1.5 -1.5 Steady 0 0.25 32 2.4E-03 65 6



0

10.00

20.00

30.00

40.00

0E+00 3.75E-03 7.50E-03 1.13E-02 1.50E-02

Tem

pera

ture

Ris

e [D

eg C

]

Peak Power Density [W/mm^2]

Delta T [8]

[5]

[1]


Envelope - Dipole Chamber downstream DW

15

0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11

0.125

0.25

0.375

0.5

0.625

0.75

0.875

1

y [mm]

y’ [m

rad]

Dipole Chamber Inner size = 2x7.5mm

Inner size-Mech.Tolerance = 7.5-1.5mm

Dipole Chamber Geometrical Envelope

SCALE 1 : 4

SECTION A-A

SCALE 1 : 8

DETAIL CSCALE 1 : 2

DETAIL DSCALE 1 : 2

DETAIL ESCALE 1 : 2

SECTION B-BSCALE 1 : 4

SECTION F-FSCALE 1 : 4

AA

FLANGE, WELDMENT, 6.00 PUMP PORTSR-VA-CHM-0034232Steel, MildHexagon Socket Head Cap ScrewANSI B18.3 - No. 10 - 24 UNC - 1

HS HCS81

FLANGE, END, 6.00 X 6.00 WELDMENTSR-VA-CHM-003613 FLANGE, END, 6.00 X 4.625 WELDMENTSR-VA-CHM-003714MAKE FROM PART NO. SR-VA-CHM-5105

CHAMBER, MACHINING, 90mm DIPOLE SR-VA-CHM-3302111

WATER CONN, DIPOLE, DWNSTRM, BEAM SIDESR-VA-CHM-006927ALUM, 6061-T651 SPACER, RF, DIPOLE TO BELLOWSSR-VA-CHM-006726 WATER CONN, DIPOLE, UPSTRM, NEG SIDESR-VA-CHM-006515 WATER CONN, DIPOLE, NEG SIDESR-VA-CHM-006314AL/SSTFLANGE, 3.370 CF, NR, AL/SSTSR-VA-CHM-004513 FLANGE, 2.75 CF, NR, AL/SSTSR-VA-CHM-002532

PARTS LISTMATERIALDESCRIPTIONPART NUMBERQTYITEM

C

D

E

B

B

F

F

A B C D

1

2

STORAGE RINGVACUUM SYSTEMS, CHAMBERS

CHAMBER, S3 ODD, 90mm WELDMENT

SR-VA-CHM-3303 ASHEET SIZE DRAWING/PART NUMBER REVISION

SHEET OF1 1

DRAWN BY

CHECKED BY

VACUUMAPPROVALENGINEERAPPROVALSUPERVISORAPPROVAL

C. LONGO

EWBS# 1.03.04.03.01

UNLESS OTHERWISE SPECIFIEDALL DIMENSIONS ARE IN INCHES

DIMENSIONS IN BRACKETS [xx.xx] (WHERE PRESENT)ARE MILLIMETERS AND ARE FOR REFERENCE ONLY

INTERPRET DRAWING AS PER ANSI Y14.5-1994 OR Y32.2-1975

DIMENSIONAL TOLERANCES X. 0.060.X 0.030.XX 0.015.XXX 0.005

ANGULAR TOLERANCE .5

FINISH

THIRD ANGLEPROJECTION

BREAK EDGES & SHARP CORNERS 0.005 MIN. TO 0.030 MAX

10/22/2009

BROOKHAVEN NATIONAL LABORATORYBROOKHAVEN SCIENCE ASSOCIATES

UPTON, NEW YORK 11973

C:\Mech-Eng\LT\SR\VA\CHM\SR-VA-CHM-3303.idw

Exploring Life's Mysteries, Protecting its Future

SCALE:SEE DWG VIEW

125

PROJECT: ESH&QRISK LEVEL

ES&H APPROVAL SR-VA-CHM-5100NEXT ASSY: QA APPROVAL

REVISION HISTORYREV DESCRIPTION DATE DESIGNER CHECKED ENGINEERA INITIAL RELEASE 10/22/2009 C. LONGO

UNRELEASED9-2-2010

111

23

VTBOTH ENDS

3XVT

VT

31

NOTES: 1. ALL VT (VACUUM TIGHT) WELDS MUST PASS A HELIUM LEAK TEST OF 2 X 10 -10 STD CC/SEC He. 2. ALL WT (WATER TIGHT) WELDS MUST PASS A 60 PSI HELIUM PRESSURE TEST. 3. WELD QUALITY REQUIREMENTS OF MIL-STD-2219 FOR CLASS B WELDS MUST BE MET. 4. USE 4043 FILLER WIRE, .045 DIA, PROTECT FILLER WIRE FROM OXIDATION AT ALL TIMES. 5. EACH JOINT TO BE HAND SCRAPED WITHIN 4 HRS PRIOR TO WELDING. 6. ALL PRODUCTION WELDS MUST BE 100% VISUALLY INSPECTED. 7. MAINTAIN WELDING PROCEDURE AND INSPECTION RECORDS. 8. WELD BEAD NOT TO PROTRUDE BEYOND INTERIOR SURFACE ON BEAM CHANNEL SIDE, EXCEPT AS NOTED. 9. FINISHED ASSY MUST BE FREE OF PARTICLES AND CHEMICAL FILM INSIDE CHAMBER AND ON FLANGE FACES. 10. PROTECT ALL FLANGE FACES FROM NICKS, SCRATCHES, DIRT AND CONTAMINNANTS. 11. 2X, HOLD ITEM NO. 8 IN PLACE USING ITEM NO. 1 WHILE WELDING. REMOVE UPON COMPLETION. 12. FABRICATE IN ACCORDANCE WITH BNL SPEC LT-ENG-RSI-SR-VA-002.

SEE NOTE 8

72

72

51

WT4X

(2.803)

62

18

.10 1 2X

MACHINE FLUSHFOR DISTANCESHOWN

NOTED AREABOTH ENDS

REF

41

SEE NOTE 11


Envelope - Dipole Chamber downstream DW

16

Mechanical Tolerances

DW Radiation vert. fan

Slot

= 15

mm

Stay Clear Envelope cannot be defined, Safe Envelope is defined

SCALE 1 : 4

SECTION A-A

SCALE 1 : 8

DETAIL CSCALE 1 : 2

DETAIL DSCALE 1 : 2

DETAIL ESCALE 1 : 2

SECTION B-BSCALE 1 : 4

SECTION F-FSCALE 1 : 4

AA

FLANGE, WELDMENT, 6.00 PUMP PORTSR-VA-CHM-0034232Steel, MildHexagon Socket Head Cap ScrewANSI B18.3 - No. 10 - 24 UNC - 1

HS HCS81

FLANGE, END, 6.00 X 6.00 WELDMENTSR-VA-CHM-003613 FLANGE, END, 6.00 X 4.625 WELDMENTSR-VA-CHM-003714MAKE FROM PART NO. SR-VA-CHM-5105

CHAMBER, MACHINING, 90mm DIPOLE SR-VA-CHM-3302111

WATER CONN, DIPOLE, DWNSTRM, BEAM SIDESR-VA-CHM-006927ALUM, 6061-T651 SPACER, RF, DIPOLE TO BELLOWSSR-VA-CHM-006726 WATER CONN, DIPOLE, UPSTRM, NEG SIDESR-VA-CHM-006515 WATER CONN, DIPOLE, NEG SIDESR-VA-CHM-006314AL/SSTFLANGE, 3.370 CF, NR, AL/SSTSR-VA-CHM-004513 FLANGE, 2.75 CF, NR, AL/SSTSR-VA-CHM-002532

PARTS LISTMATERIALDESCRIPTIONPART NUMBERQTYITEM

C

D

E

B

B

F

F

A B C D

1

2

STORAGE RINGVACUUM SYSTEMS, CHAMBERS

CHAMBER, S3 ODD, 90mm WELDMENT

SR-VA-CHM-3303 ASHEET SIZE DRAWING/PART NUMBER REVISION

SHEET OF1 1

DRAWN BY

CHECKED BY

VACUUMAPPROVALENGINEERAPPROVALSUPERVISORAPPROVAL

C. LONGO

EWBS# 1.03.04.03.01

UNLESS OTHERWISE SPECIFIEDALL DIMENSIONS ARE IN INCHES

DIMENSIONS IN BRACKETS [xx.xx] (WHERE PRESENT)ARE MILLIMETERS AND ARE FOR REFERENCE ONLY

INTERPRET DRAWING AS PER ANSI Y14.5-1994 OR Y32.2-1975

DIMENSIONAL TOLERANCES X. 0.060.X 0.030.XX 0.015.XXX 0.005

ANGULAR TOLERANCE .5

FINISH

THIRD ANGLEPROJECTION

BREAK EDGES & SHARP CORNERS 0.005 MIN. TO 0.030 MAX

10/22/2009

BROOKHAVEN NATIONAL LABORATORYBROOKHAVEN SCIENCE ASSOCIATES

UPTON, NEW YORK 11973

C:\Mech-Eng\LT\SR\VA\CHM\SR-VA-CHM-3303.idw

Exploring Life's Mysteries, Protecting its Future

SCALE:SEE DWG VIEW

125

PROJECT: ESH&QRISK LEVEL

ES&H APPROVAL SR-VA-CHM-5100NEXT ASSY: QA APPROVAL

REVISION HISTORYREV DESCRIPTION DATE DESIGNER CHECKED ENGINEERA INITIAL RELEASE 10/22/2009 C. LONGO

UNRELEASED9-2-2010

111

23

VTBOTH ENDS

3XVT

VT

31

NOTES: 1. ALL VT (VACUUM TIGHT) WELDS MUST PASS A HELIUM LEAK TEST OF 2 X 10 -10 STD CC/SEC He. 2. ALL WT (WATER TIGHT) WELDS MUST PASS A 60 PSI HELIUM PRESSURE TEST. 3. WELD QUALITY REQUIREMENTS OF MIL-STD-2219 FOR CLASS B WELDS MUST BE MET. 4. USE 4043 FILLER WIRE, .045 DIA, PROTECT FILLER WIRE FROM OXIDATION AT ALL TIMES. 5. EACH JOINT TO BE HAND SCRAPED WITHIN 4 HRS PRIOR TO WELDING. 6. ALL PRODUCTION WELDS MUST BE 100% VISUALLY INSPECTED. 7. MAINTAIN WELDING PROCEDURE AND INSPECTION RECORDS. 8. WELD BEAD NOT TO PROTRUDE BEYOND INTERIOR SURFACE ON BEAM CHANNEL SIDE, EXCEPT AS NOTED. 9. FINISHED ASSY MUST BE FREE OF PARTICLES AND CHEMICAL FILM INSIDE CHAMBER AND ON FLANGE FACES. 10. PROTECT ALL FLANGE FACES FROM NICKS, SCRATCHES, DIRT AND CONTAMINNANTS. 11. 2X, HOLD ITEM NO. 8 IN PLACE USING ITEM NO. 1 WHILE WELDING. REMOVE UPON COMPLETION. 12. FABRICATE IN ACCORDANCE WITH BNL SPEC LT-ENG-RSI-SR-VA-002.

SEE NOTE 8

72

72

51

WT4X

(2.803)

62

18

.10 1 2X

MACHINE FLUSHFOR DISTANCESHOWN

NOTED AREABOTH ENDS

REF

41

SEE NOTE 11


Transient Thermal Analyses for 500 mA

Peak Temperature vs Time

In 20 msec the peak temperature in Aluminum chamber reaches 102 °C

100 mm period Damping Wiggler, Beam Deviation: 0.47 mrad /1mm

V.Ravindranath, O.Tchubar


Temperature Saturation at 5 mA

Steady State Temperature distribution

Peak Temperature = 81°C

V.Ravindranath, O.Tchubar

100 mm period Damping Wiggler, Beam Deviation: 0.47 mrad / 1mm


Passive protection from Dipole Radiation

• Full Passive Protection• Beam Tracing

– Geometrical Envelope– Beam Envelope

• Identifying cases– beam parameters– power density calculations– temperature FEA

• Passive Protection / Safe Envelope• 25 mA• 100 mA• 500 mA

19


3D Beam Tracing

20


Passive protection for Dipole Radiation - Cases

21

Source Element Element Position

[from cent. dip.]

Element

Length

Element

misalignment [upstr.]

Element

misalignment [downs

tr.]

Element

misalignment [trnsl.]

Element

misalignment [angle]

Case Envelope

[Translation]

Envelope

[Angle]

Beam Position [vert.]

Beam Position

[hor.]

Beam Position

[ vert. angle]

Beam Position

[hor. angle]

mm m mm mm mm mrad mm mrad mm mm mrad mradDipole S3 end flange adapter Steady 7<x<7.5 any any anyDipole S3 crotcher edge Steady 7 any any anyDipole S3 crotcher center Steady 0 any any anyDipole S3 end block Steady any ? ? ?Dipole S3 flange absorber Steady any any any anyDipole S3 RF shielded bellows Steady any ? ? ?Dipole S3 chamber Steady > 7.5 any any anyDipole Steady 0 0 0 0Dipole Steady 0 0 0 0

need to check if Passive protection for Dipole Radiation can be achieved for 25, 100, 500 mA storage ring currents


Thank You !

22

Documents

Accelerator Division - Brookhaven National Laboratory Division BROOKHAVEN SCIENCE ASSOCIATES Synchrotron Radiation Protection Task Force 2 NSLS-II Synchrotron Radiation Protection