On the Korean Contributions forILC RF Sources

2nd ILC Workshop in Korea

December 28-29, 2004

포항공대 가속기연구소박 성 주

ILC RF Requirements based on TESLA500

Example of ILC Layout

Comparision between Commercial MBKsTHALESTH1801

CPIVKL-8301

TOSHIBAE3736

Frequency [GHz] 1.3 ← ←

RF Output Power [MW]

10 ← ←

Beam Voltage / Current [kV/A]

117 / 131 ← ←

Beam Perveance 3.3 ← ←

Efficiency [%] 65 ← ←

Number of Beams 7 6 6

Cathode Loading [A/cm2]

5.5 < 2.5 < 2.1

RF Pulse Duration [ms]

1.5 ← ←

Rep. Rate [Hz] 10 ← ←

Gain [dB] 48.2 ← ←

Expected Lifetime [hour]

40,000 100,000 100,000

Appearances of Commercial MBKs

THALESTH1801

CPIVKL-8301

TOSHIBAE3736

Estimation of Wall-Plug Power for RF System

Possibility of MBK Fabrication in Korea

1. Tube related capabilities in Korea:• PAL have full capabilities for providing pulsed 80-MW S-band RF system.• KAPRA is developing CW 1-MW 700-MHz Klystron for PEFP proton lin

ac.• There are considerable activities in Universities (SNU, POSTECH,…).

2. In-house tube R&D can be performed but not recommended.

3. Localization of tube design followed by the acquisition of fabrication drawings (if possible !) would be the right choice for fast fabrication.

4. Possible collaboration scheme:• PAL-KAPRA for high-power RF technologies and infra-structures.• Distributed resources (mainly among Universities) for investigating variou

s physics & engineering isssues.

PAL’s Potential for MBK Fabrication

1. Special facilities for klystron fabrication• XHV Baking Station• Various Furnaces• HP Microwave Test-Lab

2. Infra-Structures• Chemical Cleaning Shop, Plating Facility, Welding Shop, 3D CMM,

…• Magnetic Field Measurement Facilities• Full-line of Microwave Equipments

3. High-Quality Manpowers• Beam-Dynamics Experts• Mechanical Engineers• High-Power Electrical Engineers• RF Engineers (LL & HL)• XHV Experts• were involved in the PLS construction, now in the PAL XFEL project

4. Expected Production Rate: ~ 10 tubes/year