director’s review july 25-27, 2006 t. shaw1 des review des front end electronics wbs 1.3 t. shaw

Director’s Review July 25-27, 2006 T. Shaw 1

DES Review

DES Front End Electronics

WBS 1.3

T. Shaw


DES FE Project Definition

We must read out a large focal plane of CCDs

62 Science CCDs

8 Alignment CCDs

4 Guide CCDs

The Science and Alignment CCDs are read out at the same rate with the same clocking patterns

250k-pixels/s @ 10e- rms noise

The Guide CCDs will be readout at a faster rate; will not interfere with required “quiet” time of Science and Alignment CCDs


DES FE Electronics WBS structure


LBL CCD

Vsub Vsub

HI_U HI_L

H2_U H2_L

H3_U H3_L

Vr_U Vr_L

RG_U RG_L

Video_U Video_L

Vdd_U Vdd_L

Vopg_U Vopg_L

SW_U SW_L

TG TG

p+ guard p+ guard

FS1 FS1

FS2 FS2

FS3 FS3

V1 V1

V2 V2

V3 V3

n+ guard n+ guard

Vsub Vsub

CCD Bond Pads2048 x 409615 µm pixelCCD

Vertical clockingmoves chargetowards serialregister

Horizontal clockingmoves charge along serial outputregister to videooutput amplifiers


Signal Count per CCD

Each CCD will require control of the following signals:Horizontal clocking

H1_U, H1_L, H2_U, H2_L, H3_U, H3_L, SW, RGVertical clocking

V1, V2, V3, TGErase control

n+ guardBias voltages

Vr_U, Vr_L, Vdd, Vopg, Vsub

Totals: 13 clocks per CCD5 bias levels per CCD

“Tuning” of optimal CCD readout is accomplished by adjusting clock rail voltages and bias settings. We are assuming, relying on current test results, that production readout can group at least 3 CCDs together with like clock rail settings.


CCD Packaging – Picture FrameWBS 1.3.1

CCD is wire bonded to a polymide board


CCD Packaging – Pedestal PackageWBS 1.3.2

CCD is wire bonded to an AlN board

37-pin Nanonics Dualobe connector


Monsoon Readout SystemWBS 1.3.6

Monsoon– Developed by NOAO

– Crate based system (Eurocard format)

– cPCI backplane used (no cPCI protocol)

– Open Design• Schematics available• Firmware available• Layout files available

– Boards exist• Master Control Board• Clock and Bias Board• 8 Channel Acquisition Board

– Large software framework exists

http://www.noao.edu/ets/monsoon/





Monsoon Block Diagram


Monsoon Crate

MCBCBB8-ChCCDAcq.


History of Monsoon at FNAL

Mid 2004DES group looks into the Leach and Monsoon Systems as possible readout solutions. Leach is

an established proprietary readout system for CCDs. Monsoon offered some advantages – higher density (8 channel card vs 2 channel card of Leach); telemetry readout (readback of clock rail voltages and bias voltages); designed for large mosaics; open architecture; easy to customize. (Lots of manpower already expended by NOAO on Monsoon ~12 engineering years/~5 programmer years/~5 board layout years.)

University of Illinois Urbana-Champaign began to purchase the initial Monsoon test stands.March 2005

FE workshop at FNAL; decision to continue to pursue Monsoon as readout platform.April 2005

Receive MCB, CBB and a blank prototype 8 ch CCD Acq Board to be hand assembled.Never able to achieve low noise.

Nov 2005Delivery of 2 complete Monsoon systems (MCB, CBB and production 8 ch CCD Acq Board).Fairly quickly began running with <10e- noise at ~12us/pixel.

Jan 2006FNAL takes delivery of Leach System. Leach performance quickly matches Monsoon

performance.Feb 2006

FEE Panel formed to examine choice of design platform. Specifically, to look at Leach and Monsoon.


History of Monsoon at FNAL

Feb 2006Delivery of two additional complete Monsoon Systems. One was shipped to

Barcelona

Mar 2006With “short” cable run, we are able to achieve ~6.5e- noise at ~6us/pixel

April 2006 With a pre-amp (WBS 1.3.5) located outside of dewar wall, we are able to achieve

~6.5e- noise at ~6us/pixel with a long cable

June 2006FEE Panel tasked with examining choice of Monsoon vs Leach comes back with its

findings.In summary

Monsoon work seems to be progressingKeep an eye on 12 Channel Board design; fallback to use current 8 Channel BoardLeach Controller remains a viable alternative in case of unforeseen problem with

Monsoon.

July 2006Delivery of fourth Monsoon system for FNAL


Pre-amp Board (WBS 1.3.5) currently outside of dewar


Proposed Changes to Monsoon

• To use the Monsoon System for DES, we will customize the boards for our specific application:– Build a 12 channel CCD Acq Module which would provide

customized bias voltages, RTD readout, and Vsubstrate ramp control. (WBS 1.3.8)

– Build a customized Clock Board to better address our clocking needs; greater fanout ability to drive more clocks. (WBS 1.3.7)

– Slight modification to the Master Control Board to allow for switch to S-Link as the fiber optic link. (WBS 1.3.9)

Breakout session will cover these new board designs in more detail.


PF Packaging WBS 1.3.10

UIUC has worked with FNAL mechanical engineers and proposes to instrument the telescope using three FE crates.

These crates would each contain two backplanes; one with 6 slots and one with 4 slots.

A single 4-slot section would provide for readout of up to 9 guide CCDs

The remaining backplane sections would provide readout of up to 72 science and alignment CCDs.

UIUC is also providing engineering support for crate power supplies.

MCB

CLOCK

CCD

Acq

CLOCK

CCD

Acq

CCD

Acq

MCB

CLOCK

CCD

Acq

CCD

Acq

Provides Readout of up to

18 CCDs

Provides Readout of up to

9 CCDs


Vacuum Interface Board(VIB) WBS 1.3.4

Vacuum Interface Board will provide the connection between the Monsoon boards and the CCDs on the focal plane.

Monsoon cables will plug into the VIB outside the vacuum.

Kapton cables will be used to connect between Vacuum Interface Board and the CCDs inside the dewar.


Vacuum Interface BoardWBS 1.3.4

Kapton CableWBS 1.3.3

AlN BoardWBS 1.3.2

Camera Vessel Instrumentation


DES FE Electronics L3 Milestones

DES FE Electronics L3 MilestonesL3 - CCD readout review - go ahead for V2 4/1/2007L3 - Testing of Internal Pre-amp Board and Kapton Cable Complete 5/31/2007L3 - Testing of v2 DES Clock and Transistion Card Complete 2/18/2008L3 - Testing of DES Master Control Board Complete 3/27/2008L3 - Production Electronics Review Complete 3/27/2008L3 - Testing of Vacuum Interface Boards For Camera Complete 9/12/2008L3 - Testing of Production DES Clock and Transition Card Complete 11/29/2008L3 - DES Front End Electronic Production Complete 6/25/2009

19

Monsoon Electronics Schedule & Milestones

20

DES Electronics Schedule & Milestones


Engineering Teams/Responsibilities

FNAL(T. Shaw, D. Huffman, M. Kozlovsky, Jamieson Olsen, Walter Stuermer)

Instrumentation of CCD testing stations12 Channel CCD Acq Module & TransitionVacuum Interface Board CablingPre-amps

UIUC(T. Moore, V. Simaitis)

CratePower Supply

Barcelona(Laia Cardiel, Miquel Barceló)

Clock & Bias Board Fanout Transition ModuleClock Board TransitionMaster Control Board

Madrid(Gustavo Martinez, Javier Castilla, Juan De Vicente)

Clock Board

Groups in Spain will design and produce Clock Board and Master Control Board.FNAL will prototype 12 Channel CCD Acquisition Board; Spain will produce the board.


FE Electronics Costs

COST FNAL Labor M&S TotalM&S Contingency

In-Kind Contributions

1.3 Front End Electronics $2,065,070 $1,492,354 $710,356 $137,640 $729,3001.3.1 Picture frame readout $16,584 $1,584 $15,000 $0 $01.3.2 Pedestal ALN boards $383,676 $231,960 $193,556 $41,840 $01.3.3 Kapton cables, internal $205,288 $117,288 $103,400 $15,400 $01.3.4 Vacuum Interface Board (VIB) and connectors $259,360 $172,360 $107,400 $20,400 $01.3.5 Pre-amp Signal FE boards $190,976 $108,976 $113,200 $31,200 $01.3.6 Monsoon for CCD testing $25,000 $0 $25,000 $0 $147,0001.3.7 DES Clock and Transition Modules (Madrid/Barcelona) $89,968 $89,968 $0 $0 $201,0001.3.8 Monsoon 12 channel Acquisition & Transition Boards $732,458 $638,458 $110,800 $16,800 $262,8001.3.9 Master Control Board (Barcelona) $0 $0 $0 $0 $103,500

1.3.10 FEE crates for PF Cage $30,000 $0 $42,000 $12,000 $15,0001.3.11 Integration and testing of electronics on camera $131,760 $131,760 $0 $0 $01.3.12 Front End Electronics Milestones (Section 1.3) $0 $0 $0 $0 $0


Conclusions

FE Readout is based upon the Monsoon system. This is working for the readout of our small test dewars. New customized Monsoon modules are being designed to address specific DES requirements.

Leach remains as a fallback to the Monsoon readout solution.

Next plans:

Readout an array of CCDs in the large test dewar.

Optimize cable design; location of pre-amp.


Backup slide


Monsoon Quantity/Cost estimates

director’s review july 25-27, 2006 t. shaw1 des review des front end electronics wbs 1.3 t. shaw

Documents

directors review

alignment ccds slide

science ccds

polymide board slide

shaw slide

shaw1 des review des

bias board

guide ccds