0 Plenty Energy Clean Environment Healthy Life Commissioning and Initial Operation of the KOMAC...

1Plenty Energy Clean Environment Healthy LifePlenty Energy Clean Environment Healthy Life

Commissioning and Initial Operation of the KOMAC 100-MeV Proton Linac

Commissioning and Initial Operation of the KOMAC 100-MeV Proton Linac

KOMAC / KAERI

Kyung-Tae Seol

[email protected]

KOMAC / KAERI

Kyung-Tae Seol

[email protected]

AFAD2014, January 14-16, 2014Melbourne, Australia


Outline

KOreaMulti-Purpose AcceleratorComplex

Facility Introduction

100MeV Linac

Operation Status

Plan

Conclusion


KOMAC site (Gyeongju)

KTX StationTo Seoul ~2 Hour

KOMAC phase 2 Site650m(L) X 400m(W) KOMAC site

450m(L) X 400m(W)

Seoul-Busan Expressway

Access Road 1,100m(L) x 20m(W)

• Land & Electricity for Future • Easy Access from Seoul, Busan, and Pohang• Good for sightseeing To Pohang


Main Facilities

12

34 65

Sewage Plant6Electric Substation3 Utilities4 Cooling Tower5

Proton Linac1

2 Beam Line

Site: 180,000 m2

Building: 39,843 m2

(Accelerator and beam line 14,426 m2)

Electricity : 154kV, 20MVA


Linac and Beam Lines

50 keV Injector

3 MeV RFQ

20 MeV DTL100 MeV DTLSRF TB

RI Semiconductor

Life-Medical App.

Materials

Basic Science

RI

Medical App.

Neutron Source

Basic ScienceAerospace App.

Nuclear Materials

Output Energy (MeV) 20 100

Max. Peak Beam Current (mA) 1 ~ 20 1 ~ 20

Max. Beam Duty (%) 24 8

Avg. Beam Current (mA) 0.1 ~ 4.8 0.1 ~ 1.6

Pulse Length (ms) 0.1 ~ 2 0.1 ~ 1.33

Max. Repetition Rate (Hz) 120 60

Max. Avg. Beam Power (kW) 96 160

Features of KOMAC 100MeV linac

50 keV Injector (Ion source + LEBT)3 MeV RFQ (4-vane type)20 & 100 MeV DTLRF Frequency : 350 MHzBeam Extractions at 20 or 100 MeV 5 Beamlines for 20 MeV & 100 MeV


RFQ ( Radio-Frequency Quadrupole )RFQ ( Radio-Frequency Quadrupole )

Vane Fabrication Alignment before Brazing Brazing Design

Field tuning(<2%) Installation & operation (Daejeon) Leak Test

RFQ was fabricated with a domestic company

Frequency 350MHz, Beam Energy 3 MeV, Peak Beam Current 20 mA

4 vane type, Length 3.2 m

4 dipole stabilizer rod, adopting resonant coupling


DTL ( Drift Tube Linac )DTL ( Drift Tube Linac )

Design

DT Quadrupole(field : 1.75 T±1%)

Assembled DTL

DTL Tank Fabrication(< 100 m)

Tank Surface Plating(< 100 m )

DTL tank assembly(< 100 m)

DT Position < ±40 mDT Assembly and Alignment(< 50 m )

x

DTL102 DT Alignment Result

-0.050

-0.040

-0.030

-0.020

-0.010

0.000

0.010

0.020

0.030

0.040

0.050

-0.050 -0.040 -0.030 -0.020 -0.010 0.000 0.010 0.020 0.030 0.040 0.050

x Deviation [mm]

y D

ev

iati

on

[m

m]

y

DTL was also fabricated with a domestic company

DTL consists of 11 tanks ( 3~20 MeV: 4 tanks, 20~100 MeV : 7 tanks)

350MHz, peak beam current 20mA, FFDD lattice with electromagnetic quadrupole.


100MeV Linac Installation

Microwave ion source 3-MeV RFQ 20-MeV DTL

MEBT 100-MeV DTL

20-MeV linac was operated for 5 years at Daejeon site


Beam Line & Target Room

100-MeV Beam line TR103 target room

2 Beam lines : 1 for 20-MeV, 1 for 100-MeV

2 Target rooms : 1 for 20-MeV (TR23), 1 for 100-MeV (TR103)


HPRF system

9 Klystrons : 1 for RFQ, 1 for 20-MeV DTL, 7 for 100-MeV DTL

HPRF system at klystron gallery(2nd floor)

RFQ HPRF pulse profile (400kW, 500us)Yellow : SSA

Red : ForwardBlue : ReverseGreen : Pick up


Modulator

4 Modulators (Each modulator drives 2 or 3 klystrons)

Output peak power 5.8 MW, duty 9%, pulse width 1.5 ms, repetition rate 60Hz

Modulator at modulator room(3rd floor)

Modulator output pulse(3.2MW, 500us, 2Hz)


RCCS

RCCS (Resonant Control Cooling System) for temperature control of DT.

Operation Range 21~33 C, Temperature Control < 0.1C11 sets for 11 DTL tanks

RCCS at klystron gallery(2nd floor)

RCCS water temperature at constant temperature mode

with full power DTQ


Digital LLRF System

Phase variation during HPRF operationLLRF OPI based on EPICS

RF phase : < ±0.3 deg.

Goal : 1% in amplitude, 1 degree in phase

hardware : Commercially available FPGA board

software : PI implemented in FPGA and EPICS OPI


Control System

EPICS based OPI Main Control Room

EPICS based system was developed for linac and beam lines.

Radiation monitoring system & personal safety interlock system are prepared.


Beam Commissioning

Rough tuning by the radiation level along the linac and at the target room

Precise RF set points determination by the phase scan method

Beam phase measurement by BPM


Beam at Target Room

Proton beams were delivered to TR23 and TR103.

Started user beam services from July 22, 2013.

TR103 TR23


KOMAC Operation Schedule at 2013

Operation plan

- Machine study including beam commissioning : 9weeks

- User service : 14weeks

- Maintenance : 6weeks

* Most important goals in 2013 : facility inspection, user service start

Key milestones

- Facility inspection by KINS (June 26~27, July 18)

: Permission on 100MeV linac, TR23, TR103 (July 18)

- KOPUA meeting (July 5)

: Review of the beam user proposals

- Management committee meeting (July 11)

: Review of the operation and beam service plan

- Beam user service starts (July 22)

- Beam user service finish (December 20)


KOMAC Operation in 2013

Accumulated time

- Operation time : 2,290 hrs

* Accelerator operation : Monday ~ Friday

Beam service

- Total number of samples : 937

TR20 / TR103 users ratio Users distribution Users application field


Accelerator Downtime (1)

Before July 22, beam commissioning

From July 22, user beam service start

On December 20, user beam service finish


Accelerator Downtime (2)

M02 A phase IGBT blasting

Utility

- Equipment wet at klystron gallery due to water gushed out of the nozzle for fire

extinguishing system (Shut down of vacuum, RF and control system)

- Cooling pump shut down due to momentary electrical power failure

- Radiation shielding door failure

Modulator

- IGBT blasting at low duty 500us, 2Hz

- Controller failure

- SCR firing circuit failure

- Oil pump failure

- Insufficient spare parts on the machine lead to long downtime

DTL / RF

- RF arcing at a power coupler

Ion source

- Solenoid failure

- Electromagnetic power supply failure

Floor in klystron gallery


Plan for Beam Power Upgrade

Beam power upgrade goes with the target room construction


SCL R&DSCL R&D

Design Forming E-beam welding Tuning

Cleaning Test preparation Test Test result

Eacc = 4.2 MV/m

For GeV extension of the linac, we performed R&D work of SCL cavity.

Prototyping the 700 MHz, 5-cell elliptical cavity with domestic company

Design, fabrication and test experience on the elliptical cavity


Conclusion

Two of the most important goals in 2013 Facility inspection Beam service start

Now, Beam service in 2 target rooms Many troubles in the first year operation

: Valuable experiences for future operation

For the plan, Preparation of all target rooms for many applications GeV extension for pulsed neutron source


Thank you.

www.komac.re.kr

1GeV

0 Plenty Energy Clean Environment Healthy Life Commissioning and Initial Operation of the KOMAC...

Documents

Transcript of 0 Plenty Energy Clean Environment Healthy Life Commissioning and Initial Operation of the KOMAC...