On the Korean Contributions for ILC RF Sources

On the Korean Contributions for ILC RF Sources 2 nd ILC Workshop in Korea December 28 -29, 2004 포항공대 가속기연구소 박성주

ILC RF Requirements based on TESLA 500

Example of ILC Layout

Comparision between Commercial MBKs THALES TH 1801 CPI VKL-8301 TOSHIBA E 3736 Frequency [GHz] 1. 3 ← ← RF Output Power [MW] 10 ← ← Beam Voltage / Current [k. V/A] 117 / 131 ← ← Beam Perveance 3. 3 ← ← Efficiency [%] 65 ← ← Number of Beams 7 6 6 Cathode Loading [A/cm 2] 5. 5 < 2. 1 RF Pulse Duration [ms] 1. 5 ← ← Rep. Rate [Hz] 10 ← ← Gain [d. B] 48. 2 ← ← Expected Lifetime [hour] 40, 000 100, 000

Appearances of Commercial MBKs THALES TH 1801 CPI VKL-8301 TOSHIBA E 3736

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 linac. • 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 various 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, 3 D 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