Upgrade Proposal for the ATF Damping Ring BPM

Downconverter Front-end– Fermilab Activities –

Manfred Wendt

for the Fermilab ATF DR BPM collaboration efforts

August 28, 2007; ATF DR BPMs Global Design Effort 2

Reminder: BPM Hardware Overview

BPF LPF

714

2.16

INJ

CALDown Mix

Digital I/O

Cal (~ 714)

Timing

LO (729)

CLK (64.9)

TRG

Dig. Receiv.Echotek

VME µPMotorola

5500Q

I

beamPosition(EPICS)

4 buttonBPMpickup

IF (15)beam

VME BUS

CTRL

PLL

4

4

VME

Upgrade Proposal

Motivation

• Dynamic range extension– Single bunch intensities ~ 1010 e-

– Multibunch “trains” (batches) up to 3x 20 bunches (2.8 ns), each ~ 0.7 1010 e-

– Requires: selectable gain/attenuation (remotely!)

• Commissioning, service, maintenance– Monitor supply voltages, LO-levels, temperatures, etc.– Requires: remote read-out for each downconverter.

• Calibration signals– Long term offset control, due to temperature drifts, etc.– Automatic online calibration during BPM beam operation.– Requires: remote controlled calibration signals.

August 28, 2007; ATF DR BPMs Global Design Effort 3

Goals for Nov/Dec 2007 Run• Commissioning/testing of an upgraded downconverter

prototype module– 2 PCB’s each with 2 downmix channels (SLAC)– 1 PCB with controller circuit and calibration signal generation

(Fermilab)

• Installation of the new downconverter prototype in Nov/Dec 2007

• Testing of remote control and calibration functions using a “minimum” LabVIEW based test software (no EPICS integration at that time).

• Focus on the downconverter, controller and calibration hardware to freeze the prototype design.

• Beam tests may include other BPM improvements (software, etc.) and beam studies (TbT coupling correction)

August 28, 2007; ATF DR BPMs Global Design Effort 4

August 28, 2007; ATF DR BPMs Global Design Effort 5

Beam Position Signal Processing

AB

C D

up

down

outin

DCBA

CBDAH

)()(

DCBA

DCBAV

)()(

Magnitude-based processing of 4 separate BPM signals

53 79.700.135.9][ mmPos

BPF LPF

Down Mix A

BPF LPF

Down Mix B

BPF LPF

Down Mix C

BPF LPF

Down Mix D

“Echotek” digital signal processing:

1D polynomial fit:

0.1 dB gain error ≡

27 µm offset error !

Calibration Scheme• 2 calibration tones:

– 714 + ε MHz– 714 – ε MHz– In passband of the

downconverter– Coupling through the

button BPM

• On-line calibration– In presents of beam

signals– Available only in

narrowband mode– Using separate

Graychip channels

August 28, 2007; ATF DR BPMs Global Design Effort 6

BPF LPF

Down Mix B

BPF LPF

Down Mix A

BPF LPF

Down Mix D

BPF LPF

Down Mix C

~ ~

PLL PLL

714 – 714 +

CAN Fieldbus Wiring

August 28, 2007; ATF DR BPMs Global Design Effort 7

Motorola 5500 in VME Crate

1st BPM

CAN

CAN

DB-9

CAN

CAN In CAN Out

CAN TransceiverPCA82C250

124Ω Term resistorjumpered in on lastboard

DB-9 DB-9

Twisted Pair

Twisted Pair

MC9S12XEP100 uController

CAN

CAN In CAN Out

CAN TransceiverPCA82C250

DB-9 DB-9

MC9S12XEP100 uController

PMC-ECAN-2

Last BPM

• CAN fieldbus control:– PMC-CAN controller– Daisy chain up to 32 nodes– Differential signals, up to

125kBit/sec (@500 m length)

Block Diagram

August 28, 2007; ATF DR BPMs Global Design Effort 8

Service Building

Tunnel

VME crate/CAN Motorola 5500

w/PMC

User Interface

~100’ Shielded Cat-5~30’ Shielded Cat-5 to next BPM

Gain Control

Cal ON/OFF

SPI0 on/off load

RegulatorLP38692MP-5

1MB Flash (PLL freq settings)

5VDC In

4

1

8VDC in

Buffers

ADF4153 PLL

Freq 1

ADF4153 PLL

Freq 2

Regulator LP2989IM-3.0

5 VDC

3 VDC

Freescale MC9S12XEP100 uController

to SLAC

Pads

÷ 8 ADF4007

729MHz

LO

To

Co

up

lers

Ne

ar P

ick

-up

s

Temp Monitor

PS Voltage Monitor

LO Level Readout

12-Bit A/D

ADP-2-9

ADP-2-9

Splitters

LNA on/off

1

XFORM TM01-02+

714MHz +/-

VCO

VCORegulator

LP38692MP-5

SPI1 on/off load

CLV0700E-LFFilter

CAN

222

22

3

3

CAN0

1st BPM Cal Box

Schematics: CAN Bus

August 28, 2007; ATF DR BPMs Global Design Effort 9

Schematics: CAL Board (µC & PLL)

August 28, 2007; ATF DR BPMs Global Design Effort 10

Schematics: Wiring Diagram

August 28, 2007; ATF DR BPMs Global Design Effort 11

Hardware Key Components

• PMC-ECAN-2 Bus controller– Commercial PMC CAN bus controller– VxWorks PPC driver support

• Freescale MC9S12XEP100 16-bit µContoller– Serial interface support (CAN, I2C, RS485, etc.)– 8/10/12-bit ADC’s (2x16 ch.), timers, I/O, etc.– Up to 1M flash, 64k RAM, 4k EEPROM

• Analog Devices AD4153 fractional PLL– Successfully tested the calibration generation during

the last run (729 MHz locking, 714 ± ε MHz CAL signals).– Selectable frequency, on/off switch, acceptable phase

noise and spurious harmonics.

August 28, 2007; ATF DR BPMs Global Design Effort 12

Software Components

August 28, 2007; ATF DR BPMs Global Design Effort 13

MC9S12XEP100 microcontroller control program

Fermi Cal Box SLAC Box

MVME5500

PMC-ECAN-2

VxWorks CAN Driver (vendor)

Fermi Cal Box command library

BPM control and acquisition program

VxWorks

CAN

MC9S12XEP100 microcontroller control program

Fermi Cal BoxMC9S12XEP100 microcontroller control program

Fermi Cal BoxCAN

CAN

Echotek

• Code Warrior IDE for firmware development

• No Operating system

• USB/CAN programmable

VME

Current Development Steps…

• Hardware:– Finalization of the CAL board schematics– Ordering parts for a first prototype.– PCB layout.

• Software & system integration– Waiting for CAN bus evaluation boards and software.– Integration of CAN bus controller software– µC firmware development to control PLL’s, logic level

signals and read-out ADC’s.– Great help from JLab (Al Grippo):

Code Warrior µC firmware

August 28, 2007; ATF DR BPMs Global Design Effort 14

Open Questions• Hardware interface SLAC/Fermilab

– Enclosure type and PCB dimensions?– Between PCB cabling and connectors?

• Prototype “pre”-testing procedure– Integrated system test at Fermilab?– How?– Schedule?

• ATF beam tests– Schedule?– Mechanical mounting of the new enclosures in the ring?– Power supplies and distribution?– CAN bus cabling?– Beam time?

• Design review and preparing for quantity production!

August 28, 2007; ATF DR BPMs Global Design Effort 15