Update of the commissioning of the SOLARIS 1.5 GeV storage ring - - PowerPoint PPT Presentation

SLIDE 1

Update of the commissioning of the SOLARIS 1.5 GeV storage ring

Justyna Wikłacz, Radiation Protection Officer

RadSynch17, National Synchrotron Radiation Research Center, Taiwan

SLIDE 2

In this presentation:

• Synchrotron SOLARIS – general description
• Radiation measurement equipment
• Machine commissioning:

Doses in 2015 and 2016 Measurements during injection and accumulation with different current values Encountered problems

• Beamline commissioning:

Radiation levels along the beamline

• Summary – plans for nearest future

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SLIDE 3

Synchrotron SOLARIS – general description

The beam parameters at the Injector exit Main parameters of the SOLARIS storage ring

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SLIDE 4

SOLARIS development:

• Beginning of the building construction – January 2012
• Beginning of the machine installation – May 2014
• Beginning of the linac commissioning – December 2014
• Beginning of the ring commissioning – May 2015
• Beginning of the UARPES beamline commissioning – April 2016
• Beginning of the PEEM/XAS beamline commissioning – April 2017

Status:

• Commissioning of the machine in progress (injection and electrons orbit optimization,

beam measurements, RF optimization etc..)

• Beam up to 400 mA /1.5 GeV
• Commissioning of two beamlines in progress
• One beamline under design

Synchrotron SOLARIS – general description

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SLIDE 5

Synchrotron SOLARIS – general description

Beamlines

1. PEEM/XAS (Photoemission Electron Microscopy/X-ray Absorption Spectroscopy)

• Source: bending magnet
• Energy range: 200 - 2000 eV
• Two end stations:

PEEM/LEEM (Photoemission Electron Microscope/Low-energy electron microscope) XAS (X-ray Absorption Spectroscopy) 2. UARPES (Ultra Angle Resolved Photoemission Spectroscopy)

• Source: quasi-periodic undulator
• Energy range: 8 - 100 eV

3. PHELIX

• Source: undulator
• Energy range 50 - 1500 eV

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SLIDE 6

Synchrotron SOLARIS – general description

Shielding walls

• rdinary concrete ~2.3 g/cm3
• heavy concrete ~3.2 g/cm3

linac ring – normal section ring – injection section ring

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SLIDE 7

Synchrotron SOLARIS – general description

Additional shielding

empty holes, cables and pipes trenches Front-end walls inside the ring lead walls around the kicker and the septum magnet

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SLIDE 8

Measurement equipment

Radiation measurement equipment:

• Radiation monitoring system
• 7 stations on trolleys: 7 gamma detectors and 2 neutron detectors
• Gamma detector: ionization chamber Thremo FHT 192
• Neutron detector: BF3 Thremo FHT 752
• 4 station connected to the PSS
• Portable meters
• Thermo FH 40 G-L10 (proportional counter)
• Fluke ASM 990S + GM 489-35
• Rotem RAM ION (ionization chamber)
• Environmental TLDs
• Gamma radiation
• Read-out of registered doses once per 1 month in 2015

and once per 3 months in 2016

• Read-out performed by an external accredited company

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SLIDE 9

Machine commissioning

Dose in 2015 – TLDs

Integrated current: 10.4 Ah

Dose limits (without background): Unclasified area: up to 1 mSv Supervised area: 1 – 6 mSv Controlled area: from 6 mSv

No.

Accumulated dose [mSv] in a time period in 2015

Total accumulated dose [mSv] Notes 1 2 3 4 5 6 7 8 1 <0.1 0.18 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 < 1.0 2

• <0.1

<0.1 <0.1 <0.1 <0.1 < 1.0

About 30 cm above the floor level

3 <0.1 0.16

• <0.1

<0.1 <0.1 <0.1 <0.1 < 1.0 4 <0.1 0.10 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 < 1.0 5 <0.1 0.16

• <0.1

<0.1 <0.1 <0.1 <0.1 < 1.0 6 <0.1 0.10 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 < 1.0 7 <0.1 <0.1

• <0.1

<0.1 0.18 <0.1 <0.1 < 1.0 8 <0.1 0.14 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 < 1.0 9

• <0.1

<0.1 <0.1 <0.1 <0.1 < 1.0 10 <0.1 0.11 <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 < 1.0 No.

Accumulated dose [mSv] in a time period in 2015

Total accumulated dose [mSv] Notes 1 2 3 4 5 6 7 8 11

• <0.1

<0.1 <0.1 <0.1 <0.1 <0.1 < 1.0 12

• <0.1

0.14 0.14 0.15 <0.1 < 1.0 13

• <0.1

<0.1 0.19 0.15 0.34 0.21 < 1.1

On the station 06G+N

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• <0.1

<0.1 0.20 0.15 <0.1 <0.1 < 1.0 15

• <0.1

<0.1 <0.1 0.17 0.21 0.22 < 1.0 16

• <0.1

<0.1 <0.1 <0.1 <0.1 <0.1 < 1.0

On the station 02G

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• <0.1

<0.1 0.18 0.65 <0.1 <0.1 < 1.3 18

• <0.1

<0.1 <0.1 <0.1 <0.1 <0.1 < 1.0 19

• <0.1

<0.1 <0.1 <0.1 <0.1 <0.1 < 1.0 20

• <0.1

<0.1 <0.1 <0.1 <0.1 <0.1 < 1.0 21

• <0.1

<0.1 <0.1 <0.1 <0.1 <0.1 < 1.0 22

• <0.1

<0.1 <0.1 <0.1 <0.1 <0.1 < 1.0 23

• <0.1

<0.1 0.20 0.11 0.10 <0.1 < 1.0

On the ring roof. on the station 05G

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• <0.1

0.19 0.12 0.31 0.10 < 1.0 25

• <0.1

0.36 0.16 0.16 0.25 0.17 < 1.2 26

• <0.1

<0.1 <0.1 <0.1 <0.1 <0.1 < 1.0 27

• <0.1

<0.1 <0.10 0.10 <0.1 <0.1 < 1.0 28

• <0.1

<0.1 <0.10 0.10 <0.1 <0.1 < 1.0 29

• <0.1

<0.1 <0.1 <0.1 <0.1 <0.1 < 1.0

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Machine commissioning

Dose in 2016 – TLDs

Integrated current: 197.66 Ah

Dose limits with background: Unclasified area: up to 1788 µSv Supervised area: 1788 – 6788 µSv Controlled area: from 6788 µSv

No.

Accumulated dose [µSv] in a time period in 2016

Total accumulated dose [µSv] Notes 1 2 3 4 5 1 133 251 235 204 823 133 2 154 244 230 211 839 154

About 30 cm above the floor level

3 129 255 237 195 816 129 4 137 269 228 204 838 137 5 106 250 211 204 771 106 6 129 222 228 192 771 129 7 115 231 215 185 746 115 8 115 236 218 187 756 115 9 209 212 182 187 790 209

On the le ve l o f the klystro n wa ve g uide

10 135 220 169 192 716 135 No.

Accumulated dose [mSv] in a time period in 2016

Total accumulated dose [mSv] Notes 1 2 3 4 11 92 218 179 183 672 12 203 323 277 233 1036 13 148 275 254 230 907 14 475 310 287 268 1340 15 1138 940 524 467 3069

Sup e rvise d a re a

16 457 1199 1175 1075 3906

Sup e rvise d a re a

17 90 214 319 176 799 18 76 199 170 154 599 19 107 211 167 169 654 20 115 373 282 252 1022 21 123 238 255 216 832 22 74 247 183 204 708 23 94 219 193 202 708 24 71 214 183 185 653 25 84 260 200 197 741 26 168 284 209 195 856

On the ring roof

27 84 196 149 149 578

On the ring roof. guard rail

28 141 198 165 175 679

On the ring roof. stairs platform

29 319 369 233 230 1151 30

168 227 184 169 748

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235 267 230 200 932

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162 230 213 200 805

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129 259 211 197 796

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129 240 226 207 802

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131 250 227 194 802

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Machine commissioning

RMS stations – normal operation

10.02.2017 Current: ~350 mA

Measurement results in µSv/h

Injection: 14.30 (N: 0.23) Ramping: 0.94 (N: bl) Injection: 1.36 Ramping: bl Injection: 3.80 (N: 1.94) Ramping: 0.07 (N: bl) Injection: 0.18 Ramping: 0.38 Injection: 0.22 Ramping: 0.10

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Machine commissioning

RMS stations – normal operation

08-10.03.2017 Current: ~250 mA

Measurement results in µSv/h

Injection: 9.90 (N: 0.24) Ramping: 0.50 (N: bl) Injection: 1.60 Ramping: bl Injection: 3.40 (N: 1.34) Ramping: bl Injection: bl Ramping: 0.15 Injection: bl Ramping: bl Injection: 0.76 Ramping: 0.10 Injection: 0.12 Ramping: bl Injection: 0.15 Ramping: 0.17 Injection: 0.13 Ramping: bl Injection: 1.80 Ramping: 0.16 Injection: 0.18 Ramping: 0.12 Injection: 0.19 Ramping: 0.21 Injection: 0.25 Ramping: bl Injection: 0.36 Ramping: 3.50 Injection: 0.14 Ramping: 0.10 Injection: 10.50 Ramping: 0.13 Injection: 0.30 Ramping: 0.10

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SLIDE 13

Machine commissioning

Area classification during operation

Supervised area Supervised area Unclassified area 13

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Machine commissioning

RMS stations – scrapers movement

• Measurements of minimum chamber aperture
• Lifetime measurements (electron losses)

S06 G+N (section 1) S07 G+N (service galery) S05 G S04 G (ring roof) (section 7)

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SLIDE 15

Machine commissioning

Encountered problems having influence on radiation levels:

• Bent straight sections in the ring
• increased radiation levels in a few sections
• Lack of Landau (harmonic) – electron bunches extending
• cavities installed in January 2016
• Vacuum conditioning, unknown real pressure values
• Scattered electrons have influence on vacuum measurements
• Lack of chopper – fitting the linac electron structure into the ring RF
• Not installed yet
• Will cause more effective injection. less losses during injection and possibility of choosing filling paterns
• Cooling water instability
• Oscillation of water temperature have Influence on the beam orbit

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Beamline commissioning

Radiation measurements near UARPES beamline

13-14.10.2016 Around the hutch, along the beamline – below the unclassified area limit (<0.58µSv/h) Measurements to repeat after reinstallation of the beamline

Radiation measurements near PEEM/XAS beamline

Beamline commissioning has just started with low currents, measurements will be done when it is needed.

Electron current: 168 mA Undulator gap: 150 mm Dose rate: up to 0.47 µSv/h Electron current : 210 mA Undulator gap: changed Set-up of slits and masks: changed Dose rate: up to 0.64 µSv/h

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SLIDE 17

Summary

Plans for future:

Installation of additional shielding in the most problematic sections of the ring in the experimental hall depends on radiation measurements after:

• Chopper installation
• Solving problem with cooling water stability
• RF cavities optimization

Receiving a stable beam in the ring with maximum current. Start-up of two beamlines, open to users in 2018 and building a new beamline. Purchasing more RMS station.

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SLIDE 18

Thank you!

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