G5 Beam Instrumentation

D. Gassner, E. Pozdeyev

4-09

Instrumentation GoalsMeasure

IntensityCurrent TransformerBPM’s Faraday Cups

ProfilesYAG & OTR screen PM’s

PositionBPM’s Profile Monitors

EmittancePepper pot, slits & PM’s

Beam HaloHalo scrapers

LossesPMT BLM, Ion Chamber’s, & pin diodes

Vacuum Chamber TemperatureIR Camera

G5 Instrumentation Quantities & Layout

Current Transformer 1Halo Scraper (1H & 1V) 2Pepper Pot 1Faraday Cups 2BPM’s 4Profile Monitors 5

BPM

BPM BPM BPM

Profile Monitors (YAG & Tgt)

Profile Monitors YAG & OTR

Pepper PotPorts

Halo Scrapers

CT

Faraday Cups/Beam Stops (TBD)

Gun

5-Cell Cavity

Profile Monitor YAG & Slit

Limited to vacuum related components

In-Flange Current Transformer

Bergoz ICT-CF6-60.4

Integrating type CT Fast bunchesIHR electronicsNoise <1pC beam charge

60.4mm ID40mm axial lengthRad-Hard optionBakeable to 180C, plan 48h at 150C Separate bake-out zone Internal TC, type-E

Beam Position Monitors

- Dual plane- 4 locations (3 at 2MeV, 1 at 20MeV)- BPM Button Pick-ups – Proven Design 10mm diameter SMA Connector 1- 4pF, 5% matching 200C bake-out

Signal Processing Libera BrillianceBNL Design

Profile MonitorsRadiabeam Technologies Optional PM Positions

YAG:Ce Screens: 100u thick, 10’s of pC at 2.5MeV, and ~1 pC at 20MeVOTR foils: Silicon wafer, 20MeV, & > ~130pCEmittance Slit: 50u slit on 2mm thick Tungsten plateResolution target: Adjust focus to 50u resolutionImpedance Match Cage Vacuum conductance slits

6” Cube

PM Actuator Cooling OptionCopper tubing welded around the actuator nipples to protect the actuator during the bake out, keep below 100C.

3 positionpneumatic actuator

Optics Box

Profile Monitor Optics Box

CCD CameraFull Remote Control InterfaceImage analysis & logging

Remote Control LensTriple motorZoom, focus, iris

Two mirrors for Alignment purposes CCD axis shifted upstream from the diagnostics to minimize X-ray exposure

Virtual target (20MeV locations)Resolution 50u

 Illumination lamp

Halo Scrapers, Pepper Pot, & Faraday Cup

- All 3 systems are still being designed- Vacuum ports/crosses available- Princeton Scientific possible vendor

Halo Scrapers Measure beam halo distribution Collect charge from intercepted beam halo Two sets of isolated jaws, H & V. Keithley electrometer read out. Stepper motor control & position readback.

Pepper Pot Two sets of remote control plunging slits (mask) Resulting image processed on downstream 2MeV PM viewer

Faraday Cups/Beam Stop (more details at 4:30 talk today) Located at the end of each transport Ceramic break Isolated beam stop

Loss Monitors & IR camera

Non-vacuum chamber related

Beam Loss Monitors (2 each)Machine Protection

Primary Detector

- Bare PMT’s (JLAB-CEBAF) (Hamamatsu 931B)

– Fast (<10us)

– 50dB DR (5nA – 100uA from tube), calibrate signal versus beam charge loss.

– Limited coverage

– Ion chambers (long cables), (ELBE, etc..)

– Full coverage

– Calibration (R/hr)

– less sensitive, useful at areas where we expect high levels

– Pin Diodes (MIP sensitive, small area coverage, rate limited to ~10MHz.

IR Camera Check for beam pipe heating, moveable, variable locations.Remote image display & storage.