1. RF Systems and Controls for the LERF CM Tests
Curt Hovater

2. Outline LERF RF & Controls Scope HPRF LLRF Cryomodule Instrumentation
Cryomodule Controls
PSS
Summary/Questions/Concerns/Comments
LERF Review August 3 &

3. Minimizing Effort ...Maximizing Project Leverage
CAPTAR for L1 (cable plant)
Use database to procure cables RF
RF System is supplied by project (waveguide and cables to be procured by JLAB).
Cryo controls
Assemble Rack/s at SLAC ship to JLAB (discussing now)
Vacuum controls
Ditto ...
Use as much of the project design and production as possible!
LERF Review August 3 &

4. Scope RF CM Instrumentation and Cryo Controls EPICS Test Software
HPRF
16 Solid State Amplifiers (SSA) , circulators and couplers
Waveguide in the gallery and the vault
480 VAC feed and breakers mods
LCW
LLRF
Four RF control racks and LLRF Chassis (RF Station, Precision Receiver, Resonance, Interlocks and power supply chassis)
LO/Reference Distribution
EPICS Controls
CM Instrumentation and Cryo Controls
Vacuum, Temperature diodes, Deca-Rad, Heaters, Magnet, BPM
EPICS Test Software
Cavity test applications (QL, Tuner, Qo, etc.)
Personal Safety System
Modify the present PSS such that the SSAs are incorporated
LERF Review August 3 &

5. RF System “Two Cavity Slice”
*Cryomodule Interlocks not shown
LERF Review August 3 &

6. HPRF SSAs Provided by project Circulators Provided by project
PSS: VVU and Breakers
LERF Review August 3 &

7. LERF Gallery Cartoon* Existing RF Racks/HPA Existing RF Racks/HPA LLRF
4 SSAs
LLRF
Rack
4 SSAs
LLRF
Rack
4 SSAs
LLRF
Rack
4 SSAs
*Not to Scale
LERF Review August 3 &

8. LLRF Rack layout Racks and chassis provided by project
General Rack area is temperature controlled to +/- 5C
PRC Area Temperature controlled to +/- 2C
Racks can not exceed 35 C
Total 40U rack space is needed
LCW cooling manifold in bottom of chassis maintains rack temperature
LCLS-II LLRF Racks and Cables Interface Document [ICD]
LLRF CAPTAR
Racks and chassis provided by
project
LERF Review August 3 &

9. LLRF Chassis RF Station/PRC LO Distribution Interlocks Power Supply
LERF Review August 3 &

10. Personal Safety System (PSS)
LERF has a reliable PSS system to build upon
Present CMTF SSA-PSS interface is a good design
PSS group plans to modify the LERF system and incorporate the design from the CMTF
Not seen as an issue. PSS group has the resources to accomplish this task in the time frame desired by the project.
LERF Review August 3 &

11. Cryomodule Instrumentation and Cryo Controls
Temperature diodes
Magnetic Field monitoring
Heater controls
Valve controls
Vacuum controls (insulating, coupler beam line)
Deca-rad system for radiation monitoring
Faraday cups for dark current
SC Magnet Test
Use existing magnet test stand
BPM cables and monitor (VNA).
LERF Review August 3 &

12. Project Risk
Schedule
Hardware needs to be installed by the end of February
Why? Check out and controls commissioning complete by end of April
Software
RF EPICS controls needs to be stable and ready to support SEL and GDR
Cryo controls needs to be functional in EPICS
CEBAF Operations
Lining up CM test time with CEBAF
Cryo Plant Reliability
LERF Review August 3 &

13. Questions/Concerns/Comments Thanks for your attention
Summary
Effectively installing L1 LINAC section
Goal is use as much of the project design as possible
JLAB Resource Groups (ACC, Engineering) have looked at the scope and can support the project.
Includes RF support for CM testing beyond initial commissioning
Biggest risk factor is schedule
Hardware delivery
Software seems to always be under counted
Questions/Concerns/Comments
Thanks for your attention
LERF Review August 3 &