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+