Beam Line BPM Filter ModuleBeam Line BPM Filter Module

Nathan EddyMay 31, 2005

BPM Upgrade 2

Analog FilterGain/Att

PickupIn Tunnel

Cables (RG8/RG213) to Service Building

EchotekDigitize &

Downconvert

PPC ControllerCalculate

Position & Intensity

VME

Front Panel

Cables

ACNET

Analog FilterGain/Att

Clock Trigger

A,B

A

B

RackIn ServiceBuilding

VMECrate

Ethernet

Beamline BPM Upgrade – System OverviewBeamline BPM Upgrade – System Overview

BPM Upgrade 3

PP

C C

on

troller

CD

Clo

ck Bo

ard

Ech

otek

Ech

otek

Ech

otek

Trig

ger F

ano

ut

IP M

od

ules

VME Backplane

PPC Controller – handles front end software, readout, and communication

CD Clock Board – provides each Echotek board with clock input (74MHz)

Echotek – digitizes & downconverts the 8 analog inputs (4 bpms)

Trigger Fanout – generates trigger input for each Echotek from BeamSync

IP Modules – modules to decode TCLK, generate triggers, calibration I/O

An

alog

Filter

An

alog

Filter

An

alog

Filter

Analog Filter – filters, attenuates, & amplifies analog signal as needed

Ethernet

Test/C

trl Mo

du

le

Test/Ctrl Module – handles setup of filter modules including test pulses

BPM Cables from Tunnel

Digital PS

Linear PS

Separate crate for Analog Modules – linear PS & existing control software

Beamline BPM Upgrade – Electronics OverviewBeamline BPM Upgrade – Electronics Overview

BPM Upgrade 4

Beamline BPM Upgrade – Analog Filter ModuleBeamline BPM Upgrade – Analog Filter Module 53MHz Bunched Beam

1-4 large intensity bunches (TeV)

7-84 consecutive bunches (rev P, Stacking)

2.5MHz Bunched Beam 4 bunches Accumulator to

Main Injector Test Feature (Electronics)

Inject 2.5MHz or 53MHz test signal

A=B, A<B, A>B Continuous or Triggered Pulse

Proto Type 2 layer board Done by EE support Checkout since mid Feb 2 channels, no test circuit

Production Boards 5 in hand First board with test circuit Made minor modifications Full Quantity (50) available in

June – Order this week

BPM Upgrade 5

Filter Module TestingFilter Module Testing

1st Prototype from EE Support in February Miscommunication on how to evaluate two solid state

switch candidates Minimized usefulness of board (2 weeks)

2nd Prototype from EE Support Discovered issue with output op amp unable to supply

enough current over entire signal range (1 week) Began “Real Beam” testing at F23 (3 weeks)

• Found that gain/attenuation settings needed adjustment• Found large position variations – SW120 & temperature

Decided to make Prototype run of full board (2 weeks) Analog 2.5MHz and 53MHz paths look fine Checkout control & test features Made minor modification to test input signals

Total 2 months over estimated time to produce production boards

BPM Upgrade 6

Filter Board CartoonFilter Board Cartoon

BP

LP LP

AlteraMax

CPLD

Osc

Gnd

TestInput

Input

MonitorOut (/10)

Output

G=39

G=6

G=2

-22db

Switch, Op AmpControl

TestInput

2.5MHz

53MHz

BPM Upgrade 7

Test Signal OutputTest Signal Output

53MHz 2.5MHz

BPM Upgrade 8

Beamline BPM Upgrade – Initial TestingBeamline BPM Upgrade – Initial Testing

Teststand on 2nd floor Transfer Gallery for initial testing Full VME system – ppc, echotek, trigger modules, clock

prototype Using Prototype Analog Module Using R25 diagnostic application Used to evaluate system performance and digital filter

testing

2.5MHz Pbars

0

50

100

150

200

250

300

5 10 50 100

Bunch Intensity (e9)

Po

siti

on

Res

olu

tio

n (

um

)

Expected Resolution

BPM Upgrade 9

Beamline BPM Upgrade – Initial InstallationBeamline BPM Upgrade – Initial Installation

Have new rack installed at F23 Split pickup signals to both old and new system Use for beam commissioning in parallel with old system Initial installation rack – full infrastructure currently

installed (minus required number of filter modules) Used to evaluate Filter Module prototype

Fast Time PlotData Logger

BPM Upgrade 10

Beam Signal ParametersBeam Signal Parameters

ModeBunch Intensity

(e9)Cable Length (ft) Range (dB)

1 Proton Bunch to TeV 250 - 400 171 - 621 10.5

4 Pbar Bunches to TeV 10 - 170 142 - 651 31.8

Stacking Protons (84) 40 - 130 120 - 621 17.3

Reverse Protons (7-35) 3 - 15 120 - 651 21.5

2.5MHz Pbars (4) 5-100 120 - 651 33.5

Max Echotek input 1.1Vpp Measurement range requirements +/-15mm Yields 900mVpp maximum at 0mm (A=B) Choose to use 700mVpp to give some headroom

BPM Upgrade 11

Arm & Trigger EventsArm & Trigger Events

Transfer Lines TCLK MIBS Delay

Prot MI to TeV P1 $4D $7C 2.7 sec

Pbar MI to TeV A1 $40 $7B 6.7 sec

Prot TeV to MI A1 $5D $D8 6.7 sec

Prot MI to Target P1,P2,AP1 $80 $79 1 sec

Prot MI to Acc P1,P2,AP1,AP3 $93 $7E 2.5 sec

Pbar Acc to MI AP3,AP1,P2,P1 $91 $7A 22.6 sec

BPM Upgrade 12

Beam Line BPM Upgrade – RequirementsBeam Line BPM Upgrade – Requirements

Beams Document 1279-v3.3