E.Kistenev, Forward Upgrade Meeting 08/18/04 Forward (Nose Cone) Calorimeter: Update 2.5 mm

E.Kistenev, Forward Upgrade Meeting 08/18/04

Forward (Nose Cone) Calorimeter: Update

2.5 mm


Physics

• A-dependence of the partonic structure functions at small x

+ jets / isolated lepton pairs / lepton pairs + jets

• A-dependence of pt-broadening (black body limit)

0’s• Spin dependence of the gluon

structure function (via W production)– lepton-isolation, total yield in e-

channel


- reasonable resolution for e/m showers – the only measurement which can be precise given all PHENIX Forward constrains;

- e/ and charged/neutral hadron separation;

- /0 identifier;

- jet recognition, good space vector, reasonable 4-vector jet measurements;

- combined muon tracking starting close to production vertex;

- e//jet triggers;

NCC MUST have superior pattern recognition capabilities

fine laterally and longitudinally segmented sampling calorimeter !!!

given real estate constrains ->W+Si

Spec’s ….


Cost of curiosity


Concept in general & Cost (no cont.)

Item Quantity Cost

W 1.8 t 200k

Si (calorimeter) 14 m2 1000k

Cables 5184 100k

Readout units 384 100k

Preamps (16 ch) 3904 300k

Receivers 52 50k

Digitization & pipeline

8704 490k

Si (strips) 1.15 m2 130k

/0 ident. SVX4 readout

48 100k

Total today ~2.5 m


Cost saving options

Further cost/benefits analysis may result in ~10% total cost reduction:

(1) increasing thickness of the W plates (to 3mm) and Si layers (to ~500mkm) will reduce the total amount of Si in calorimeter;

(2) (2) increasing the pad size to ~2x2 cm2 will reduce the number of channels but ….. will make pattern recognition even bigger a challenge.

Biggest cost items are (1) Si, (2) Preamps and (3) Digital readout.

We are currently trying to clarify answers to two questions:

-Do we really have the collaborator who can do the preamp development at no cost to PHENIX – item (2);

-Is there really out there the digital readout for ~10k channels available for free - item (3).


Item Total “Confirmed”cost

Probablecost

W 1.8 t 200k

Si (calorimeter):Silicon wafers Sensors production and testing

14 m260003904 (good sensors)

912k132k780k

Si (g-p0 identifier):Silicon wafersSensors production and testing

1.15 m2600320

109k13 k96k

Flex cables (sensor PCB interconnect) 3904 100k

Readout units and cablesPCB140 contacts cables

384768

97k39k58k

Preamps 16 or 32 ch ( ~2$/ch in production) without R&D and chip design

40000ch 300k

SVX4 and service electronics:SVX4Service electronics (could be used electronics from Fermilab - ?)Fastbus crate

5041

50k + ???=100k18k32k??????

Digitization&pipeline, 12 bit ADC 8704 360k (30% cont)

EDIA on digital processing 250k (30% cont)

Trigger ???

Global contingency 400k (20%)

Total known ~2.5 m > 0.3m


R&D 2004-2006US ( BNL ++)• Conceptual mechanical design (BNL/Dubna);• Conceptual system design (BNL/Nevis/Trieste);• Prototype mechanical design (UCR/BNL/Dubna);• Component testing and prototype construction (UCR/BNL/MSU);• Full readout for prototype testing (BNL/MSU);• Test beam setup (at BNL/IHEP/KEK ?);• Packaging concepts (BNL/MSU)

MSU• Pad Sensors• Readout units & cables• Receiver boards

Prague• Strip sensors, SVX4 learning curve in - electronics engineer from Prague must first to go to ORNL

(October/November probably !!!!!) then to Japan (Atsushi) to help with sensor/SVX4 testing in Japan;

Trieste • Preamps

Dubna• Mechanics


Getting through the development stage

Prototype Sensors MSU / Trieste(strips) Early 2005 Sizes mismatch

Prototype readout ~on shelf (MSU) Mid 2005 $10k, DAQ, cables/connectors

Prototype mechanics BNL, UCR, Dubna ? $10k

Mechanical design BNL, Dubna+industry 2005 $30k

Packaging concept & prototype

BNL, MSU, Trieste 2005 Analog summing untested

$30k

Preamps & receivers Trieste , MSU 2006 $30k

Dig. readout design & prototyping

BNL, Nevis, Trieste 2006 $250 k

SVX4 learning curve & readout design for strip layers

Prague, Trieste 2006

Construction 2007-2008 ~2 m

Coordination of this project is probably the biggest challenge.

Both R&D and production are supposedly mostly in Europe, in difference to the central tracker project we have NO strong OUT-of-US group able to serve the center of gravity for this project. If no one else is

interested – this will be a role BNL must play

…. with no control over project money – will it work?


How to integrate NCC into PHENIX


receiver digitizerDelay/

event buffers

receiver digitizerDelay/

event buffers

Trigger Sum

To DCM

L1 trigger board

Readout method:

Digitize signal as early as possible

Generate trigger sum output (2X2) from the ADC output

Total channel count:Calorimeter 2060+2060+35840 identifier 8240

NCC readout concept (Chi)


Possible implementation

DCM

Readout unit

Rec

eive

r

Max 256x10 inputs

Readout unit

Si Sensor

Flex cable

256 analog lines

Pre

ampl

ifie

rs

10 units maximum

Trigger processor

Digitizer &

FPGA based

pipeline


PHENIX Grand Central


Terminal buildings ….

NCC

Receivers


Real estate sharing

Digitizer Boards

NCC readout location on

the surface of magnet pole

Central tracking communication lines


The end


Urgent

Technical progress on• Skeleton support structure allowing staged implementation of

the new PHENIX central detectors;• Design of NCC Mechanics (in collaboration with potential

manufacturers);• Component analysis of the NCC readout.

Managerial support for• NCC needs equal standing with all other components of the

new PHENIX Central;– R&D funds for 2005;

• Help from BZ to cement the Collaboration.


What’s going on now….

• MSU – ready to work …

• Trieste – possibly one person working part time on preamps for NCC in 2005;

• Prague (Institute of Physics + Charles University) – planning to apply for funding under umbrella of US-Czech

Cooperation (dead line – September)

• Dubna – will probably help with mechanical design & construction

• Iowa– will work on trigger

• BNL / UCR / Nevis– everything else and more to come …..


SPS TestBeam Data:p & e-

200 GeV/c

Ultimate e - h separation

10GeV p-

10GeV e-

M.Boezio, INFN, Trieste, PAMELA


Partonic structure functions


Reaching into saturation region

-pairs

pp, 100+100

pp, 250+100

Documents

E.Kistenev, Forward Upgrade Meeting 08/18/04 Forward (Nose Cone) Calorimeter: Update 2.5 mm