# Presentation: 344024

## Beam Line BPM Filter Module

- Nathan Eddy
- May 31, 2005

## Beamline BPM Upgrade – System Overview

- Analog Filter
- Gain/Att

- Pickup
- In Tunnel

*Cables (RG8/RG213)*
* **to Service Building*

- Echotek
- Digitize &
- Downconvert

- PPC Controller
- Calculate
- Position & Intensity

*VME*

*Front *
*Panel*
*Cables*

- ACNET

- Analog Filter
- Gain/Att

- Clock

- Trigger

*A,B*

- A

- B

- Rack
- In Service
- Building

- VME
- Crate

*Ethernet*

## Beamline BPM Upgrade – Electronics Overview

**PPC Controller**

**CD Clock Board**

**Echotek**

**Echotek**

**Echotek**

**Trigger Fanout**

**IP Modules**

*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

**Analog Filter**

**Analog Filter**

**Analog Filter**

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

*Ethernet*

**Test/Ctrl Module**

**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 – 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

## Filter 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

## Filter Board Cartoon

- BP

- LP

- LP

- Altera
- Max
- CPLD

- Osc

- Gnd

- Test
- Input

- Input

- Monitor
- Out (/10)

- Output

- G=39

- G=6

- G=2

- -22db

- Switch, Op Amp
- Control

- Test
- Input

- 2.5MHz

- 53MHz

## Test Signal Output

- 53MHz

- 2.5MHz

## Beamline 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

## Beamline 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 Plot

- Data Logger

## Beam Signal Parameters

| Mode | Bunch 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

## Arm & 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 |

## Beam Line BPM Upgrade – Requirements

- Beams Document 1279-v3.3