130 likes | 244 Views
EMMA RF System, Costs Carl Beard, ASTeC, Daresbury Laboratory. EMMA RF Specification. Proposed Cavity Design. IOT Options. PSU, Controls and Pre-amp required for CPI/Thales IOT (integrated Amplifier is being developed). Klystron Options.
E N D
EMMA RF System, Costs Carl Beard, ASTeC, Daresbury Laboratory FFAG 07 Carl Beard
EMMA RF Specification FFAG 07 Carl Beard
Proposed Cavity Design FFAG 07 Carl Beard
IOT Options • PSU, Controls and Pre-amp required for CPI/Thales IOT (integrated Amplifier is being developed) FFAG 07 Carl Beard
Klystron Options • 160kW (possibly 170 kW) klystrons are available from e2v • PSU, Pre-amp, Cooling systems required • PSU Requirements - 45kV, 5.8A (SRS PSU) FFAG 07 Carl Beard
Cost for Power Sources + PSU *Does not require PSU † Using SRS PSU, 2nd Klystron is recommended, out of spec Cornell klystron could reduce the capital cost. FFAG 07 Carl Beard
Cost options Power Source + PSU FFAG 07 Carl Beard
Cascaded Distribution Circulator 7dB 6dB 3dB 4.8dB Load IOT 3-Stub Tuner • The same regardless of number of splits. • Compact System • Single Cavity Amplitude Phase and Amplitude not possible • Klystron option similar (1 Klystron feeds all 19 cavities) FFAG 07 Carl Beard
Split Distribution • Fewer Circulators are required • Odd Number splits complicate the system. • Single Cavity Amplitude Phase and Amplitude not possible • Large Waveguide Distribution 3dB 3dB 7dB IOT 3dB FFAG 07 Carl Beard
Ancillary Equipment FFAG 07 Carl Beard
LLRF Distribution Phase Shifter SS Amp Amplitude Control Master Oscillator IOT Comparator Level Detector Comparator Mixer • Costs • Based on ERLP system • New system required to be developed. • TTF System closer to what we need • In the combined systems only takes feedback from a single cavity • Phase control of the cavity group is possible • Individual IOTs for each cavity required for separate Amplitude and Phase adjustment • The string of cavities would be phased locked to the control cavity FFAG 07 Carl Beard
RF System Costs (Minimum) • Cavity £200k • RF Source IOT £440k • Klystron £250k x2 • RF Distribution £170k • LLRF £???k • Klystron option Total £620k (£250k) • IOT Option Total £810k FFAG 07 Carl Beard
Summary • Prototype Cavity needs manufacturing and tendering • Klystron Option is the cheapest • larger overhead and no need to reconfigure distribution • Spare Klystron should be ordered • If we order ASAP, costs will be reduced • Cascaded RF Distribution would be the optimum since space is valuable. • Costs alter little between options • LLRF System needs developing (TTF System is close to what we need) FFAG 07 Carl Beard