LLRF and Beam-based Longitudinal Feedback Readiness Outline Overview of the system December 2006 readiness requirements Dependencies Activities to get there – past/present/future Conclusion

Overview of the system The low level RF controls system consists of RF phase and amplitude controls at these locations: Laser Gun (Klystron 20-6) L0-A, a.k.a. L0-1 (Klystron 20-7) L0-B, a.k.a. L0-2 (Klystron 20-8) L0 Transverse cavity (Klystron 20-5) L1-S (Klystron 21-1) L1-X (Klystron 21-2) L2 - (Klystrons 24-1,24-2,24-3) to control avg phase/ampl of L2 L3 Transverse cavity (Klystron 24-8) L3 - 2 sectors of klystrons, S29+S30 The feedback system consists of a VME chassis connected to LLRF IOCs via private ethernet

Dec 2006 readiness requirements RF phase and amplitude controls at these locations: Laser Gun (Klystron 20-6) L0-A, a.k.a. L0-1 (Klystron 20-7) L0-B, a.k.a. L0-2 (Klystron 20-8) L0 Transverse cavity (Klystron 20-5) L1-S (Klystron 21-1) Longitudinal beam-based feedback controls as far as BC1

Dependencies Use of current downtime to proceed with installation at LINAC Sector 0 RF hut readiness with racks, AC power, cables and water by July2006 (downtime)

Activities to get there past/present/future Five categories of hardware Low level RF chassis (in-house) Monitor chassis (in-house with COTS timing) Fast control chassis (in-house with COTS timing) Slow control chassis (in-house) Feedback control chassis (COTS products)

Low level RF chassis (in-house) What for? Low level RF distribution where EPICS is not required Where? LINAC Sector 0, the RF hut and klystron stations Status now: 119, 476, 2856, 2830.5 MHz – 16 way distributions complete Steps to complete: by Oct2005: PEP-II master phase shifter by Nov2005: IQPAU by Nov2005: 476 MHz master amplifier by Jan2006: LO chassis

RF Distribution

PEP-II master phase shifter 476 MHz master amplifier PEP-II master phase shifter

LLRF Phase Reference System 2830.5 to 2856MHz Divide by 16 Chassis

LLRF Phase Reference System 119 to 476MHz Divide by 16 Chassis

Monitor chassis (in-house with COTS timing) What for? Local RF phase/amplitude monitoring Where? Laser, gun, L0-A, L0-B, L1-S Status now: Evaluating ADCs Steps to complete: by Dec2005: evaluation of ADCs (1chan) by Mar2006: board prototype (4 chan, thermo) by May2006: final board by Sep2006: chassis (15 dual channel) by Oct2006: injector install

Fast control chassis (in-house with COTS timing) What for? Local RF phase/amplitude control Where? Laser, gun, L0-A, L0-B, L1-S Status now: board design Steps to complete: by Jan2006: board prototype by Mar2006: final board by Sep2006: chassis (6 single channel) by end of 2006 downtime: injector install

Slow control chassis (in-house) What for? Phase and amplitude control of the reference Where? Sector 20 RF hut Status now: not started Steps to complete: by Feb2006: start design by Mar2006: board prototype by May2006: final board by Sep2006: chassis (6 single channel) by Nov2006: injector install

RF crate What for? Local feedback control and timing for RF systems Where? Sector 20 RF hut Status now: testing EVR Steps to complete: evaluate number of signals and processor load to determine number of crates design and write software test with simulation and later hardware during 2006 downtime: install

Feedback control crate (COTS products) What for? beam-based longitudinal feedback Where? At sector 20, in RF hut Status now: software design Steps to complete: purchase network switch module if IOC has insufficient ports by Dec2006: software by Dec2006: installation

Conclusion The low level RF system and the global feedback system will be ready for commissioning by December 2006, based on the plan presented.