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Introduction, RAON Specification of the 2nd cryogenic plant for RAON
Sungwoon Yoon July 12, 2017/Madison, WI
July 12 2017 2
Content
1. Introduction
2. Cryogenic plants
3. Specifications
4. Summary
July 12 2017 3
Introduction RISP and RAON
RISP: Rare Isotope Science Project
RISP belongs to institute for basic science.
RISP is the name of our project.
The project was launched in Dec. 2011 and the target date for the project is 2021.
The goal of the project is to construct a heavy ion linear accelerator.
RAON: Rare isotope Accelerator complex for ON-line experiments
RAON is pure Korean word meaning “delightful”
RAON has three superconducting linear accelerators.
First Linac(SCL1) will usually accelerate the stable ion beams.
Third Linac(SCL3) will usually accelerate the stable and unstable ion beams.
Second Linac(SCL2) will reaccelerate all ion beams.
** In-Flight separator * Isotope Separator On-Line
The name of our accelerator is “RAON”.
Rare isotope ion beams are produced by ISOL* and IF separator**.
IBS: Institute for basic science
July 12 2017 4
Introduction RAON layout
Low energy experimental hall B
High energy experimental hall B
IF fragment separator
High energy experimental hall A
ISOL seperator
Low energy experimental hall A
ECR ion source
First linac(~ 100 m)
Driver Linac (1st -> 2nd linac) Post (3rd -> 2nd linac)
Particle 1H+ 16O8+ 238U79+ RI beam(132Sn47+)
A/q 1 3(7) 3(7)
Beam energy (MeV/u) 600 320 200 18.5
Beam current (pµA) 660 78 8.3 -
Power on target (kW) > 400 400 400 -
Second linac(~ 200 m)
Third linac (~ 100 m)
Extension area for upgrade(~ 100 m)
SCL 1
SCL 2
SCL 3
July 12 2017 5
Introduction RAON facility
Utility bldg
Cryogenic bldg
SRF assembly bldg
SRF test facility
Assembly bldg
RF test facility
Detector develop
Administrative bldg
Information center
Dormitory
Control center Accelerator bldg
Electricity bldg
Site area : 952,066 m2
Preserved forest area
July 12 2017 6
Introduction Daejeon, S. Korea
Madison
IBS(S. Korea)
IBS/RISP(~2018) Daejeon
Seoul Incheon
(ICN)
Busan
Jeju
IBS(2018~)
RISP(2019~)
Daejeon
Japan
South Korea
North Korea
RISP(2019~)
© Google © Google
PAL(Pohang)
KoMAC(Gyeongju) SRF TF(~2018)
July 12 2017 7
Introduction Superconducting cavities
Quarter Wave Resonator (4.5 K) for SCL 1 & 3 Half Wave Resonator (2.05 K) for SLC 1 & 3
Single Spoke Resonator 1 (2.05 K) for SCL 2 Single Spoke Resonator 2 (2.05 K) for SCL 2
Beam line direction
July 12 2017 8
Introduction Cryomodules
Cryomodule for QWR
Type of
cryomodule
No. of
cryomdoule
Type of
cavity
No. of
cavity
QWR cryomodule 22 (SCL1) + 22(SCL3) QWR 1
HWR1 cryomodule 13(SCL1) + 13(SCL3) +
3(bending) HWR 2
HWR2 cryomodule 19(SCL1) + 19(SCL3) HWR 4
SSR1 cryomodule 23(SCL2) SSR1 3
SSR2 cryomodule 23(SCL2) + 2(Extension) SSR2 6
Cryomodules for HWR
Cryomodule for SSR1 Cryomodules for SSR2
July 12 2017 9
Introduction Acceleration system
Injector SSR1 cryomodule SSR2 cryomodule
QWR
cryomodule
HWR1
cryomodule
IF fragment
separator ISOL HWR2
cryomodule
RAON’s SC magnets
July 12 2017 10
Introduction In-flight Fragment separator
Main separator
High Energy Beam Transfer
Dipole 1
Dipole 2
Dipole 3
Dipole 4
Dipole 1 Dipole 1
Dipole 2 Dipole 3
Dipole 4 Dipole 5
Dipole 6
Dipole 7
Quadrupole 1~3
Quadrupole 4~6 Sextupole 1
Quad-triplet 1
Quad-triplet 2
Pre-separator
Quad-triplet 3 Quad-triplet 4
Quad-triplet 5
Quad-triplet 6
Quad-triplet 7
Quad-triplet 9
Quad-triplet 8
Quad-triplet 10
Quad-triplet 11
Quad-triplet 12
Quad-triplet 13
Focusing Target
HTS magnets in high radiation region is operated under 35 K : Dipole [1 EA], Quadrupole [6
EA], Sextupole [1 EA]
LTS magnets for beam delivery are operated at 4.5 K : Dipole [4 EA]
LTS magnets for beam separator are operated at 4.5 K : Dipole [7 EA], Quad-triplet [13 EA],
Sextupole, Octupole
Its 2.05 K cooling power is about 4.1 kW.
July 12 2017 11
Cryogenic plants Overview
Cryogenic plants
Each linac has its own cryogenic plant. (three cryogenic plants)
The cryogenic plants for SCL1 and SCL3 are almost same.
Their 2.05 K cooling power is about 0.9 kW.
The cryogenic plant for SCL3 is on bidding stage.
The cryogenic plant for SCL2 is much larger than others.
To specify the its technical specification, we have had two industrial studies with makers.
July 12 2017 12
Cryogenic plants heat loads of SCL2 and IF separator
Operation modes
(DLCP)
2.1 K Load, W 4.5 K Load 40-60 K, W
Isothermal Non-isothermal Total Isothermal
(W)
Non-isothermal (W) Total (W)
Liquefaction
(g/s) Total
Supply Return
Nominal* 3,774 341 4,115 950 180 179 1,309 1.0 18,818
Commissioning** 1,354 341 1,695 950 180 179 1,309 1.0 18,818
Turndown*** 524 341 865 950 180 179 1,309 1.0 12,753
4.4 K standby - - - 1,474 180 520 2,132 1.0 12,753
TS standby**** - - - - - - - - 12,753
Maximal liquefaction Loads in 4.4 K standby mode plus maximum liquefaction rate at rising level into the storage tank
* RF power : 100%
** RF power : 25%
*** RF power : 0%
**** Emergency mode
Cold box Q4
Q2 Q3 Q1
F1
L2 L1
55 K GHe return
35 K GHe supply
4.5 K sub-cooled SHe supply
4.5 K GHe return VLP return
300 K GHe return
July 12 2017 13
Cryogenic plants Cold end clarifications
Nominal operation
SCL2 Low Temp. SC magnets
0.5 g/s
184 W
4.50 K
1.3 bar
766 W
4.50 K
1.3 bar
Sub-cooled heat exchanger
15.1 g/s
180 W
179 W
3.81 K, 32 mbar
11.0 g/s
4.76 K, 1.25 bar 4.50 K, 1.3 bar
4.50 K, 3.0 bar
2.05 K
36 mbar
4.66 K, 2.9 bar 4.66 K, 2.9 bar
238.9 g/s
228.6 g/s 51.7 g/s 10.3 g/s 9.3 g/s 1.0 g/s
40.7 g/s 9.8 g/s
176.9 g/s 341 W
3.45 K, 35 mbar
161.8 g/s
3774 W
176.9 g/s
61.0 g/s
July 12 2017 14
Specifications Operation conditions
TS standby
Unit Mode 2.05 K 4.5 K 4.5 K – 300 K 35 – 55 K Remark
From cold box
Pressure bar
- - - - - - - - - - -
Temperature K
- -
- -
- -
- -
- - -
Mass flow rate g/s
- -
- -
- -
- -
- - -
To cold box
Pressure bar
- - -
Temperature K
- - -
Mass flow rate g/s
- - -
Power W
-
-
- - - - - -
Nominal
Beam commissioning
Turndown
4.5 K standby
TS standby
Nominal
Beam commissioning
Turndown
4.5 K standby
TS standby Nominal
Beam commissioning
Turndown
4.5 K standby
TS standby Nominal
Beam commissioning
Turndown
4.5 K standby
TS standby
Nominal
Beam commissioning
Turndown
4.5 K standby
TS standby
Nominal
Beam commissioning
Turndown
4.5 K standby
TS standby
Nominal
Beam commissioning
Turndown
4.5 K standby
TS standby
3.0
3.0
3.0
3.0
Max. 21
Max. 21
Max. 21
Max. 21
Max. 21
4.5
4.5
4.5
4.5
< 35
< 35
< 35
< 35
< 35
ΔP > 0.5
ΔP > 0.5
ΔP > 0.5
ΔP > 0.5
ΔP > 0.5
ΔT > 20
ΔT > 20
ΔT > 20
ΔT > 20
< 1.25
< 1.25
< 1.25
< 1.25
< 0.032
< 0.032
< 0.032
18818
18818
12753
12753
1298
1298
1298
2132
4115
1696
865
12753
> 4.8
> 4.8
> 4.8
> 5.2
> 3.9
> 4.5
> 6.1
> 175
> 175
> 119
> 119
> 119
61.0
60.2
59.8
87.7
176.9
63.5
24.6
> 175
> 175
> 119
> 119
> 119
238.9
124.7
85.4
88.7
1.05
1.05
1.05
1.05
1.05
300
300
300
300
300
1.0
1.0
1.0
1.0
1.0
ΔT > 20
July 12 2017 15
Specifications Other conditions
Small cold mass
No LN2 pre-cooling
Cold compressors in the integrated cold box
One integrated cold box
One back up compressor
Cool down time is about 2 weeks
EPICS interface
Modbus TCP protocol
July 12 2017 16
Summary
Rare Isotope Science Project
Our goal is to construct the heavy ion superconducting linear accelerator, RAON.
RAON can accelerate some rare isotope beams as well as some stable beams.
RAON has four types of SC cavity and five types of cryomodule.
Until the end of 2019, we have to make the first beam with SCL3.
Until the end of 2021, we could serve the high energy isotope beams with SCL3 and SCL2.
Cryogenic plants
We have to install the three cryogenic plants.
The cryogenic plant for SCL3 is on bidding stage.
To specify the 2nd cryogenic plant is almost finished.
The main specifications are Non LN2 pre-cooling, one integrated cold box, and the back-up
compressor.
July 12 2017 17
Thank you for the attention Questions?
Special thanks to
ESS, ITER, KSTAR-NFRI, LCLS II-SLAC, DESY, CERN and J-Lab
May 28, 2017
ISOL SCL3
SCL2
Cryogenic bldg
July 12 2017 18
Appendix Ⅰ PFD of SCL 2 cryomodules
P&ID by Dr. Youngkwon Kim and Mr. Ki Woong Lee
19.0
19.5
July 12 2017 19
Appendix Ⅱ Parameters of SC cavities
Parameters Unit QWR HWR SSR1 SSR2
ßg - 0.047 0.12 0.30 0.51
f MHz 81.25 162.5 325 325
QRs Ohm 17 36 94 112
R/Q Ohm 468 295 246 296
Vacc MV 1.0 1.5 2.4 4.1
Epeak MV/m 35 35 35 35
Bpeak mT 57 55 58 64
Qcalc - 6.8×108 1.4×109 9.0×109 10.5×108
Temp. K 4.5 2.1 2.1 2.1
July 12 2017 20
Appendix Ⅲ Modified cryomodules
Top-loading cryomodule
We could keep the inside of the cavity clean during the assembling.
July 12 2017 21
Appendix Ⅳ Organization
Ministry of Science,
ICT and Future Planning(MSIP)
Project Promotion Committee
National Research Foundation
Rare Isotope Science Project
Sunchan Jeong(Director)
System Installation Division
Jong Won Kim(Head)
Int. Adv. Committ.
Tech. Adv. Committ.
Sci. & Prog. Adv. Committ.
Civil Eng. Adv. Committ.
Facility Construction &
Infrastructure Division Administration Division
Accelerator system team
RI and Experiment system team
Technical support team
RI Science(Theory) team
Project coordination Department
Institute for Basic Science
Research Centers for
Rare Isotope Science
Facility &
Safety Management team
Construction
Managements team
Management Planning team
General Affairs team
Project Management team
Project Cooperation team
July 12 2017 22
Appendix Ⅴ Stable beams
U 92
238
Proton
Proton + Neutron
U 92
238 34+
U 92
238 79+
U 92
238
Uranium
O 8
16
Oxygen
Sn 50
118
Tin
H 1
1
Proton
Stable beam
July 12 2017 23
Appendix Ⅵ Unstable beams
Sn 50
118
Stable beam
Sn 50
132 33+
Sn 50
132 48+
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