26 April, 2016 LCLS II Cryomodules and Cryoplant, Joe Preble LCLS-II Overview JLAB Organization for LCLS-II JLAB responsibilities & Schedule and Status Facilities for LCLS-II Cavity Treatment & Test Facilities for Cryomodule Assembly & Test Cryoplant overview – Dana Arenius will cover

LCLS-II Overview JLAB Organization for LCLS-II JLAB responsibilities & Schedule and Status Facilities for LCLS-II Cavity Treatment & Test Facilities for Cryomodule Assembly & Test Cryoplant overview – (to be confirmed)

3 Electron source, linac and transport 186 MHz CW gun, Cs 2 Te photocathode 4 GeV linac: 1.3 GHz: 35 cryomodules, 8 cavities/module, 9 cells/cavity 3.9 GHz: 2 cryomodules, 8 cavities/module, 9 cells/cavity

Closely based on the European XFEL / ILC / TESLA Design – 20 year old design with > 1000 cavities built – SC Cavities use Nitrogen Doping CEBAF-12 GeV Upgrade Cryoplant adapted 4 Cryogenic Systems Scope: ComponentCountParameters Linac4 cold - segments 35 each 8 cavity Cryomodules (1.3 GHz) 2 each 8 cavity Cryomodules (3.9 GHz) 1.3 GHz Cryomodule8 cavities/CM 13 m long. Cavities + SC Magnet package + BPM 1.3 GHz 9-cell cavity280 each16 MV/m; Q_0 ~ 2.7e10 (avg); 2.0 K; bulk niobium sheet - metal Cryoplant2 each4.5 K / 2.0 K cold box system; K equivalent Cryo Distribution260 m vacuum-jacketed line, 2 each distribution boxes, 6 each feedcap / 2 each endcap

5 Cryogenic System CP2CP1 U-tube TL Jumper Connections

LCLS-II Overview JLAB Organization for LCLS-II JLAB responsibilities & Schedule and Status Facilities for LCLS-II Cavity Treatment & Test Facilities for Cryomodule Assembly & Test Cryoplant overview – (to be confirmed)

JLab Org Chart 7

JLab Scope - Cryomodule Production of ~½ the 1.3 GHz cryomodules (1 Prototype, 17 production, 1 spare) – Modify JLab infrastructure to support production – Procure ~ ½ components for both FNAL and JLab Production Major procurement in place including SRF cavities – Support design effort with reviews, etc. Supported various design reviews, workshops, and collaboration meetings Provide QA and fabrication documentation SQAP signed off, QA/QC plans part of every procurement 8

JLab Scope – Cryo Plant, LLRF Design and Procurement of Cryogenic Refrigerators – Specification of all cryoplant components First major procurement is 4.5K Coldbox – contract placed, kick off meeting with vendor held in October Warm compressor – contract placed, kick off meeting with vendor held in October Cold compressor specification review complete cryo plant building requirements complete – Procurement of plant and performance verification at SLAC – Support SLAC and FNAL with requirements and analyses – Safety support and analyses LLRF design, R&D, prototyping, design verification 9

JLab Schedule 10

LCLS-II Overview JLAB Organization for LCLS-II JLAB responsibilities & Schedule and Status Facilities for LCLS-II Cavity Treatment & Test Facilities for Cryomodule Assembly & Test

Cryomodule Scope PL Management and Integration JLAB Cryomodule Management Cryomodule Integration and QA Engineering and Design Engineering and Design 1.3 GHz Design Verification Tuner Accelerated Life Testing Microphonics Studies Shipping Test Prototype 1.3 GHz Cryomodule Prototype Procurements Prototype Cavity Preparation and Test Prototype Cavity String Assembly Prototype Cryomodule Assembly Prototype Cryomodule Test

Cryomodule Scope GHz Cryomodule Procurements Cavities HOM&FP Feedthroughs Cavity Flange Hardware Cavity String Bellows Gate Valves Cavity Tuners HOM Absorbers

Cryomodule Scope GHz Cavity Preparation and Test GHz CMs GHz Cavity String Assembly GHz CMs GHz Cryomodule Assembly GHz CMs GHz Cryomodule Test GHz CMs

Cryomodule Scope Infrastructure Design Cleanroom Fixtures CM Assembly Fixtures CMTF High and Low Power RF Cryo interface Installation Support and Shipping Shipping 18 CMs Support for installation and commissioning 3 CMs

16 Integration: LCLS-II 1.3 GHz CM procurement model Procurements distributed, deliveries split JLab/FNAL (SOTR) LCLSII-4.1-PM-229

Infrastructure Required assembly modifications & upgrades are complete VTA for production cavity testing HTB for horizontal cavity testing Cleanroom for cavity string assembly Assembly tooling for CM assembly Required testing modifications/upgrades are in progress – End caps for CM testing – CMTF for completed CM acceptance testing – Ready in Jan/Feb 2015 – Shipping fixture design is complete; procurements begin in FY2016 to support shipping tests after prototype acceptance tests are completed 17

JLab Layout for LCLS-II CM Production Clean Room String Assembly Vacuum Vessel Installation 18 Final Assembly / Prep for Testing CM Testing Phase II CM Assembly (2X) Phase I CM Assembly (2X)

19 LCLS-II Cavity String Components & Tooling

LCLS-II Cold Mass Spreader Bar Installed (Phase II Assembly) 20

Cantilever Fixture Installed 21

CM Assembly Tools Installed 22

23 Processes, Procedures and Travelers Developed list of procedures and travelers for CM production based on CM assembly processes – Leveraged C100 experience Implementing receiving and inspection travelers for the prototype cavity string components – FNAL & JLab SOTRs are collaborating Procedures are based on C100 experience and fold in XFEL techniques in use at Saclay – Assembly travelers for pCM cavity string assembly – Assembly travelers for pCM assembly in progress – Plan to refine production procedures and travelers based on pCM experience Cold Coupler Assembly for HTB Vertical Testing Preparation

Facilities Improvements : Testing in CMTF End Cans (2 sets to support CM production rate) In-house fabrication in progress for prototype cryomodule testing Ready December 2015 – Connects CM to CTF valve box via u-tubes – Interfaces for valves, LL and diodes to monitor and control helium flow/inventory – Provides reliefs for primary circuit, shield circuit and insulating vacuum space HPRF Ready January/February 2016 Will be returned to SLAC – Receive 1.3 GHz 3.8 kW Solid-State Amplifiers (SSAs - 8 from SLAC) – Procure and Install Isolators – Install Coax Waveguide and Modify Interlocks – Run line power to SSA/Circulators – Provide controls in CMTF Control Room LLRF Ready December 2015 – RF Instrumentation (arc detectors, IR sensors, etc.) – Provide digital controls in CMTF Control Room – Software development 24