The CTF 3 Test Beam Line TBL Introduction

The CTF 3 Test Beam Line (TBL) • Introduction • Status • Outlook 1 DUMP 8 m DFD 2. 0 m 16. 5 m 16 m DUMP F F D D F DFD F DU D F ITB 1. 4 m Transport path D F D MP 42. 5 m Steffen Döbert, ACE, 17. 01. 2008 3. 0 m DF 22. 4 m F D FD DFD 2. 5 m TBTS D D F 1. 85 m DFD F 0. 75 DUMP TBL 6 m D F F FD LIL-ACS 22 m F D D D F P DUM LIL-ACS 3. 0 m DF TL 2’ 2 m CALIFES Probe beam injector

Goals and Requirements ‘Realistic’ show case of a CLIC decelerator High energy spread beam transport, low losses (Bench mark simulations) RF Power Production, Stability (End Energy <50%, 2. 4 GW of RF power) Alignment (Test procedures for BBA) 100 microns alignment for PETS, test of CLIC alignment equipment) Drive Beam Stability, Wake fields (no direct measurement of the wake fields) Industrialization of complicated RF components

TBL-cell TBL cell length 140 cm PETS: active length max 80 cm RF-Load 16 cells planned = 22. 4 m 23 mm aperture in PETS 24 mm max in Quads/BPM’s BPM Quad Mover Ion Pump FODO lattice: b-max = 4. 72 m b-min= 0. 83 m m-cell = 90 deg 100 cm 140 cm 15 cm 25 cm

PETS design

TBL beam dynamics 1 m ~ 3 ns

TBL beam dynamics Nominal PETS Q = Q 0 Beam jitter 0. 5 s ~ 1 mm Misalignment: s. PETS = 200 mm; squad = 20 mm Results for 90/100 machines simulated

CLIC decelerator beam dynamics Wakefield effects Misalignment and correction

Plans for shutdown 2007/2008 o Only one module to test the prototype elements 1 TBL DUMP 8 m DFD 2. 0 m 16. 5 m 16 m DUMP FD D F D 2. 5 m TBTS DFD F ITB 1. 4 m Transport path MP DU 42. 5 m 1. 85 m DFD 0. 75 DUMP F FD LIL-ACS 22 m D 3. 0 m DF D F P DUM LIL-ACS 3. 0 m DF TL 2’ 2 m CALIFES Probe beam injector

Status of the prototype components PETS: rf design finished, PETS manufacturing and tank design progressing BPM’s: one analog unit finished and tested at CERN, 2 BPM prototypes under assembly Quads: New design by Th. Zickler finished, prototype in April Quad-Movers: Ciemat prototype under test at CERN High power rf: directional couplers, loads and waveguide components ordered Low Level rf: being manufactured TL 2’ diagnostics: Currently installed End of line diagnostics: currently studied

PETS tank, under mechanical design, PETS test pieces successfully produced, full length bar ordered (prototype will be without damping) WR 90 waveguide Power extractor Copper rods Vacuum port

Quad New Quad type-R, wire machining, manifold cooling, multiple coils per pole

Module integration

Installation Started, first girder mounted in CLEX Currently planned to be finished in April 2008

What do we want to demonstrate Power production: Energy balance, rf-pulse stability Efficiency: Low loss beam transport Stability: Emittance growth ? Bench mark simulations: Energy spread, phase space, beam parameters Alignment, initial and beam based, test procedures Test of PETS technology HOM damping of PETS

Tentative TBL-Schedule

Conclusions Ø Need to test prototypes first, before further decisions can be made Ø Have to rely on PETS design Ø If the prototypes are successful we can start the series (collaborators and budget ? ) Ø Schedule is probably not realistic Ø Need to incorporate temporary diagnostics before the end of the line Ø Ongoing work on what we can learn from TBL for CLIC Ø TBL is not CLIC ! Ø Need to work on the future of TBL and CTF 3 now ?

TBL long term idea’s ACE recommended upgrading TBL to an 800 Me. V two beam test accelerator (16*2=32 acc structures with a total length of 8 m = 800 Me. V) Upgrade probe beam for full beam loading and pulse length Upgrade CTF 3 to full CLIC pulse length, better emittance and higher energy Wakefield kick measurement option ? (photo injector with two bunches adjustable in distance in either probe or drive beam) More CLIC-like modules Alignment test facility Resistive wall and Fast Beam-Ion Instability tests

‘CTF 3 upgrade’ Scenario A: Turn around Califes, add 180 deg bend

The end, reserve slides following

TBL long term idea’s

‘CTF 3 upgrade’ Scenario B: Move TBL towards and into CTF II, add 10 deg chicane

‘CTF 4’ Scenario C: Add 180 deg bend to Califes, new CLIC style drive beam transport, CTF II space needed

Quad movers Quad moving table, Prototype finished’ Under test at CERN

BPM-analog electronics Prototype tested successfully at CERN in December, needs a bit of fine tuning before installation

BPM Two prototypes under construction (currently coating of the ceramics at CERN)

CLIC decelerator dynamics Adiabatic effects alone With PETS misalignment With quadrupole misalignment How does it look for TBL can we measure it and how ?

TL 2’ to TBTS CB. MOV 0205 CCS. MTV 0980 CCS. VPI 0990 CC. VPI 0950 CC. DHD/DVD 0940 CCS. DUM 0995 CC. BPR 0915 CC. QFL 0910 CC. VVS 0900 CC. BPM 0930 CC. QDL 0920 CC. MTV 0970 CC. WCM 0960 CM. BHL 0100 CB. VVS 0100 CB. QFM 0110 CB. QDM 0120 CB. DHD/DVD 0130 CB. VPI 0135 CB. BPM 0150 CB. DHD/DVD 0140 CB. QDR 0200 CB. BPS 0210 CB. VPI 0215 CB. PET 0220 TL 2 and TBL in CLEX 2008 TBL Prototype Module