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2015.3.18

The design of HEPS digital BPM electronics

BI Group, accelerator division

outlines Why we do it? Design and some considerations RTM （ Rear Transition Module ） Data processing AMC （ Advanced Mezzanine Card ） Signal processing part Time we need?

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1 ， Beam orbit stability is very important for accelerator.

2 ， For HEPS, the smallest beam size is 3um, so the resolution of BPM should be 0.1µm ， the beam orbit stability will reach to 0.3um.

3 ， Libera brilliance of Instrumentation Technologies are used in many accelerators. But it is expensive, so we want to manufacture by ourselves.

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Why we do it?Why we do it?

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We take microTcA.4 as the architecture ， which includes analog electronics-RTM （ Rear Transition Module ） and digital signal processing module-AMC （ Advanced Mezzanine Card ）。 The important work includes software work and hardware work, we do them at the same to save the time. software ： 1 ， bunch by bunch diagnostic tool based on BEECube platform can verify signal processing algorithm. 2 ， To buy some commercial hardware based on microTcA, on which software work will be done. hardware ： 1 ， to design and manufacture the analog module and digital module, then transfer the software to it. Accelerator

TimingSystem

Machine&&PeopleProtection

System

AcceleratorTimingSystem

SMA 1#

SMA 2#

SFP 1# && 2#

CLOCKMGT

FPGAGbE

UART 1#

UART 2#

LED_ARRAY

RST_BTN

MMC

ADC

ADC

ADC

ADC

ADF

CONN

ECTO

RAM

C CO

NNEC

TOR

Cros

sbar

Swi

tch

Cros

sbar

Swi

tch

Cros

sbar

Swi

tch

Cros

sbar

Swi

tch

Fi l ter Amp. Attenuator

Fi l .Amp.Att.Fi l .Amp.

Fi l .Amp.Att.Fi l .Amp.

Fi l .Amp.Att.Fi l .Amp.

Fi l .Amp.Att.Fi l .Amp.

RF i

nARF

inB

RF i

nCRF

inD

RFou

tARF

outB

RFou

tCRF

outD

Inje

ctio

n tr

igge

r

Beam

ref

. cl

ock

Accelerator Control System

Redundant IPMB-0

IPMB-L

IPMC

Shel fManagerActive

ShMC

Shel fManagerBackup

ShMC

Four pi ck-upRF signal

Cont

rol

Driv

er

System DesignSystem Design

数字 BPM 研制方案

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RTMRTM Rear Transition Module

band pass filter and gain control to monitor signals

AMCAMC

AMC （ Advanced Mezzanine Card ）Simple designSome definitionModule Management controller (MMC)Choice of MCHChoice of communication between AMC module and main control CPU

Design of AMCDesign of AMCThe principal board of AMC

definition

Choice of communication way

Ethernet is enough

MMC （ Module Management Controller ）

• Power supply and led lamp configure by MMC

Timing management and IEEE 1588

Commercial MCH is our choice ， PCB design in the future

Signal processing part:• Digital quadrature mixing module• 92 extract ratio （ CIC and FIR filter)• Amplitude acquire module

DDS design

Acquiring of turn by turn data

• 23 extract ratio CIC filter

• 4 extract ratio FIR filter

• Quardratic sum of IQ

• Square root module based on CORDIC

Simulation result on matlab CIC filter design

How many time we need?

From now on, Do you think 5 years are enough for us to design and manufacture a mature digital electronics that can be used in HEPS(high energy photon source).

There are 4 people for digital BPM electronics, one is for analog part, one is for digital part, one is for FPGA software development, one is for EPICS device and control interface.

Pls give me your advice and comments for the design and the time consuming. I will write them on the paper and request you to sign.