July LEReC Review July 2014 Low Energy RHIC electron Cooling Alex Zaltsman Power Amplifiers and LLRF

July Outline Scope High Level System Description Parameters Major Procurements Relocated equipment Location in LEReC Milestones Cost estimate and FTEs Risk list Summary 2

July Scope 3 Design, specify and purchase High Power Amplifiers for Superconducting and Normal conducting cavities Re-use as many RF components (including PA’s from ERL and CeC) Test and commission all PA’s Plan and supervise the move of all RF components from ERL to 2 o’clock Design, build and commission LLRF system for all RF cavities Provide timing and locking of the LEReC to RHIC systems

July High Power RF equipment New Procurement –2 each 65 kW 704 MHz power amplifiers –2.1 GHz 20 kW klystron based amplifier –Circulators and dummy loads –Waveguides Equipment from ERL and CeC –50 kW 704 MHz circulator and dummy load –704 MHz 20 kW amplifier, circulator and dummy load from CeC –Waveguides and couplers from both ERL and CeC 4

July Parameters RF systemFrequencyVoltage MHzV SRF gun (Superconducting) E+06 5 cell superconducting cavity from ERL E GHz cavity (copper) E+05 5

July Superconducting RF gun Two 65 kW PA’s Off the shelve IOT based amplifiers 704 MHz Circulators 6

July Cell 704 MHz cavity Use 20 kW CeC PA Use ERL 50 kW circulator and dummy load Use CeC waveguide to the 2 o’clock tunnel 7

July GHz normal conducting cavity 20 kW PA based on CPI 2.11 GHz klystron Packaged into the IOT based amplifier 2110 MHz Circulator 8

July Location in LEReC 9 Drwg from Al

July LLRF 10 The LLRF system for LEReC is based on the RHIC LLRF Platform already successfully deployed at RHIC, AGS, Booster, EBIS and the ERL Experiment. The Platform has been described extensively elsewhere. See for example: The current ERL System comprises three 704 MHz sub-systems (Linac, Gun and Laser). LEReC LLRF is an extremely similar architecture. No new hardware, firmware or software needs to be developed. The only “new” component to be developed is up/down conversion for the 2.1 GHz cavity. Based on existing ERL 704 MHz up/down conversion. 2.1 GHz LLRF controller proper is identical to a 704 MHz controller (the LLRF Platform).

July LEReC LLRF Simplified Block Diagram 11

July LLRF System Integration for LEReC 12 Integration and synchronization of LLRF Platform relies on: –A distributed 100 MHz Ultra Low Phase Noise Master Oscillator (master clock) –The LLRF “Update Link” (timing, synchronization and data link) All C-AD LLRF systems are interconnected and synchronized via the LLRF Update Link. –RHIC (Bldg 1004A)  AGS (Bldg 929)  Booster (Bldg 914) –RHIC (Bldg 1004A)  RHIC (Bldg 1004D)  56 MHz SRF Passive Storage cavity –RHIC (Bldg 1004A)  RHIC (Bldg 1002A)  Bunch by Bunch Damper LLRF  LEReC LLRF System

July LEReC LLRF system integration with RHIC LLRF is a straightforward extension. We’ve already demonstrated integration of a LLRF system at the 2 O’Clock IP. –RHIC Bunch by Bunch Longitudinal Damper System. We’ve already demonstrated control of the SRF Photocathode Gun for LEReC at ERL. LLRF System Integration for LEReC

July Milestones Specify and place the order for 2.1 GHz amplifier1/2015 Specify and place the order for 703 MHz amplifiers3/2015 Place the order for the remaining components6/2015 Set up a test area for testing incoming equipment10/2015 Receive all RF equipment1/2016 Tests all amplifiers3/2016 Start installation in 1002A6/2016 Fully test all amplifiers into the dummy load9/2016 All high power RF amplifiers ready for commissioning with the cavities1/

July Risk list 2.1 GHz amplifier –CPI is the only manufacturer of klystron –Need to integrate the klystron into the amplifier and test 15

July Summary Ready to proceed on the moment notice No foreseen issues 16