12 GHz Stand alone power source - Indico

download report

Transcript 12 GHz Stand alone power source - Indico

12 GHz Stand alone power
source
Provisional Klystron Parameters
Parameters
Specifications
units
RF Frequency
12 (11.4)
GHz
Peak RF power
50 -75
MW
RF gain
dB
Efficiency
%
RF pulse length
Pulse repetition rate
1
µs
100
Hz
Duty cycle
Klystron voltage
Klystron current
Inverse klystron voltage
Observations
%
470 (Toshiba)
540
250 (Toshiba)
360
max
kV
Nominal voltage: kV
A
Nominal current: A
kV
0.8 (Toshiba)
1.0
AV-1.5
Heater voltage
max
V
Nominal value between and V
Heater current
max
A
Nominal value between and A,
Heater start up surge current
max
A
15 min
mn
Average collector power
max
kW
A x kV x3.5 µs x 100 Hz
Average output power
max
kW
50 MW x 1.0 µs x100 Hz
Average body and window
power
max
kW
Micro perveance
Preheating period
Peak RF drive power
Output circuit VSWR
W
1.5 max
Pref < 1.8 MW, 4% of reflected
power
Modulator Requirements
•
•
•
•
•
•
•
•
1 or 2 klystrons?
Klystron 500kV/360A (1.0 µp) max
Klystron 470kV/250A (0.8 µp) Toshiba catalogue
1 µs flat top
100 Hz
Estimate single tube modulator 390 kEuro (+/-15%)
Estimate twin tube modulator 600 kEuro (+/-15%)
This is based on line type modulator with quotes from
industry for 1.0 µp option
• Can specify modulator to be built for 1 klystron and
upgradeable to pulse 2 (probably more expensive)
Proposed Installation area in CERN
• Preferably in the CLEX area
• There are two possibilities in CLEX
– Zone A, old streak camera room in 2013
– Zone B, laser room in 2013
• Zone A is 5.9m x 2.7m and would probably be
okay for the single klystron option
• Zone B is 9.2m by 4.5m
• Another option is in Building 174 beside
klystron storage and workshop area
Zone A or Zone B
• Positive
– Could be used to power CLEX structure
– Infrastructure for water cooling, controls etc
– Test area directly below modulator in CTF2
• Negative
– Testing interrupted during access
– No water during annual shutdown and maintenance
to water stations
– Size and handling difficulties (see next page)
– For zone B laser needs to be removed to another area
(already foreseen?)
Klystron maintenance
area with crane
CLEX-G
outside
Path to transport
equipment from outside
via elevator
2.7m
Elevator
2.4m height
5.9m
Zone A
100m
1.8m
4.5m
1.6m
9.2m
1.1m
Zone B
1.85m
Path to transport
klystron to maintenance
area with crane
Building 174
• Positive
– More space , no size restriction on components of
modulator (cheaper?)
– Overhead crane
– Test area could be constructed with concrete
blockhouse
– More test time availability
• Negative
– Cant be used on CLEX facility
– Need 30 degree water temperature stabalising
Additional costing
•
•
•
•
•
•
•
Lead shielding of klystron
Preparation of water cooling distribution
Preparation of test area
Concrete Blockhouse (B.174)
3 phase power requirements (TS/EL)
Low level RF including klystron driver
Waveguide network
Strategy
•
•
•
•
•
•
•
•
•
Decide klystron parameters
Decide on 1 or 2 klystron option
Decide area to be used
Finish modulator specification with respect to above
decisions
Order klystron(s)
Price enquiry for modulator
Cost analysis for infrastructure in area that is chosen
Prepare test area in parallel to klystron and modulator
orders
Price enquiries for low level equipment necessary
(“borrow” where possible equipment from SLAC?)
CERN Manpower and Material
Requirements
• Procurement, installation commissioning of modulator and klystron
with low level driver
– 2 FTE
• Water stations
– Material cost, outside contractor?
• Electrical supply
– Material cost, outside contractor?
• Test area
– Preparation, FSU
– Concrete blockhouse, material plus transport service
• Operation of test facility
– Probably be absorbed within CTF3 klystron operations for modulator
and klystron
– For 12 GHz structures?