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ILC Beam Instrumentation – A Short Overview of Fermilab R&D Activities –. Manfred Wendt Fermilab, AD-Instrumentation. The International Linear Collider. ILC Beam Parameters (nominal):. ILC Beam Instrumentation. ~ 2000 Button/stripline BPM’s (10-30 / 0.5 µm resolution)

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ILC Beam Instrumentation – A Short Overview of Fermilab R&D Activities –

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ILC Beam Instrumentation– A Short Overview of Fermilab R&D Activities –

Manfred Wendt

Fermilab, AD-Instrumentation

All Experiementers' Meeting


The International Linear Collider

ILC Beam Parameters (nominal):

All Experiementers' Meeting


ILC Beam Instrumentation

  • ~ 2000 Button/stripline BPM’s (10-30 / 0.5 µm resolution)

  • ~ 1800 Cavity BPM’s (warm, 0.1-0.5 µm resolution)

  • 620 Cavity BPM’s (cold, part of the cryostat, ~ 1 µm)

  • 21 LASER Wirescanners (0.5-5 µm resolution)

  • 20 Wirescanners (traditional)

  • 15 Deflecting Mode Cavities (bunch lenght)

  • ~ 1600 BLM’s

  • Many other beam monitors, including toroids, beam phase monitors, wall current monitors, faraday cups, OTR & other screen monitors, sync light monitors, streak cameras, feedback systems, etc.

  • Read-out & control electronics for all beam monitors

All Experiementers' Meeting


FNAL ILC Instrumentation R&D

ILC Instrumentation R&D activities at Fermilab include:

  • Design and development of beam- and non-beam instrumentation

    • A Cold CM-free L-Band cavity BPM for the cryomodule

    • Digitizer boards: general purpose VME and high-speed HA ATCA-style

    • Reuse, upgrade of A0-Photoinjector beam instrumentation, e.g. BPM pickups, screen monitors, interferometer-based monitors, etc.

    • RF-klystron interlock system

    • Non-beam cryomodule instrumentation: Faraday-cup & WPM read-out

      to support the on-site facilities:

    • SCRF test stands (HTS, CC2, etc.)

    • A0-Photoinjector (including some new beam-line instrumentation for emittance exchange experiment)

    • NML test accelerator (focus is on non-beam instrumentation for startup)

  • ILC R&D collaboration activities:

    • ATF Damping Ring BPM Upgrade collaboration (KEK/SLAC/FNAL)

    • HOM coupler signal study collaboration at FLASH/TTF (DESY/SLAC/FNAL)

    • Electro-optical sampling (EOS) bunch length measurement collaboration (ANL/NIU/FNAL)

    • Planned: EOM-based beam phase measurement collaboration (DESY/FNAL)

All Experiementers' Meeting


NML Beamline Instrumentation

beam

trans.

bunch compressor

capture cavities1 & 2

doublet

triplet

quads

dipole

doublet

RF-gun

3.9 Ghz cav

C

PS

O

F

O

O

O

O

S

B

T

Y

B

C

O

B

O

S

S

T

O

O

Y

O

S

O

S

T

S

Y

S

O

T

T

T

P

S

DRAFT

phase I

O

low energy

injector dump

ILC Module 1

doublet

doublet

dipole

beam-line for advanced beam instrumentation, e.g. EOS, Laser-wire, OTRI, cavity BPM’s,…

HOM couplers

O

S

S

T

B

S

O

S

O

high energy intensity dump

C

B

T

O

dog leg test beam-line (TBD)

S

Beam current / bunch charge (T:toroid)

Time-of-flight or beam phase monitor

Synchrotron light bunch length monitor

BPM (B:button, S:stripline, C:cavity, PS:perp. stripline)

Screen monitor (Y:YaG, O:OTR, C:CTR, S:slit, F:F-cup)

T

triplet

S

S

dipole

doublet

All Experiementers' Meeting


Cold L-Band Cavity BPM R&D

Goal: Development of acold CM-free L-Band cavity BPM with 1 µm single bunch resolution

All Experiementers' Meeting


Cavity BPM Principle

Problems with simple

“Pill-Box” Cavity BPM’s

  • TM010 monopole common mode (CM)

  • Cross-talk (xy-axes, polarization)

  • Transient response (single-bunch measurements)

  • Wake-potential (heat-load, BBU)

  • Cryogenic and cleanroom requirements

All Experiementers' Meeting


Cold Cavity BPM Prototyping

All Experiementers' Meeting


A0-Photoinjection Instrumentation

Button BPM

Toroid

Beam Phase Monitor

Screen Monitors

All Experiementers' Meeting


VME & ATCA Digitizer R&D

Generic and “fast” VME digitizer:

  • 5.5 / 50 MS/s sampling rate

  • 16 / 14 bit resolution

  • 12 / 8 ADC/DAC channels

  • 500k / 8M sample buffer per channel

  • FPGA programmable operation modes

    High-speed ATCA digitizer R&D:

  • 500 MS/s sampling rate

  • 12 bit resolution

  • 16 ADC/DAC channels

  • High-availability (HA) design

  • Analog front-end integration (rear transition module)

All Experiementers' Meeting


RF Klystron Protection Interlock

Forward power 200 kW, undersampled

Reflected power 200 kW

VME-based RF klystron protection interlock for klystron, waveguide and input coupler signals (fwd/refl-power, temperatures, PMT arc detection, etc.)

59.1 ns detection time!

All Experiementers' Meeting


ATF Damping Ring BPM Upgrade

Upgraded BPMs

ATF DR BPM Upgrade Collaboration with help of the force of “Joda”Goal: 0.1 µm resolution to achieve < 2 pm vertical emittance in the ATF damping ringAchieved in March 07: 0.6 µm

All Experiementers' Meeting


HOM Coupler Signal Studies

HOM Studies CollaborationBeam-based cavity alignment,HOM BPM system (~ 5 µm res.)

All Experiementers' Meeting


EOS Bunch Length Measurement

Electro-optical sampling (EOS) by temporal decoding

EOM Studies Collaborationat the ANL Advanced Wakefield Accelerator (AWA)Goal: Bunch length measurement R&D

All Experiementers' Meeting


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