CASTOR at CMS Enhancing Forward Physics

Apostolos D. Panagiotou

University of Athenshttp://cmsdoc.cern.ch/castor/

Diffractive & Forward Physics Workshop Antwerp 25-26/10, 2007

CMS Coverage in pT -

CMS fwd calorimetry up to || 5 + Castor + ZDC

0-12 -10 -8 -6 -4 -2 +2 +4 +6 +8 +10 +12

pT (

GeV

)

0.1

1

10

100

1000CMS

T1T1T2 T2RP

pTmax~s exp(-η)

CA

STO

R

CA

STO

RZDCZDC

HF HF

figure adapted from Risto Orava (Diffraction 2006)

Unprecedented coverage at hadron colliders !

CASTOR

ZDC

Physics with CMS Forward Calorimeters

Hadronic Forward (HF)

• Low-x dynamics:• Parton saturation, BFKL/CCFM dynamics, proton structure, multi-parton

scattering• Diffraction• Measurements for cosmic ray data analysis:

• Forward energy and particle flows, minimum bias event structure• Two-photon interactions and peripheral collisions• QED processes to determine luminosity to O(1%), via pp pp ee and pp pp

• Forward physics in pA and AA collisions• New forward physics phenomena:

• Disoriented Chiral Condensates, incoherent pion emission, Centauros, Strangelets….

IP

Recent Developments

1. CASTOR approved by CMS-MB as CMS baseline detector on 21-05-07

2. One calorimeter will be built by end of 2008 (224 channels)

3. FEA calculations completed

4. Prototype construction & assembly study completed

5. Skeleton construction studies completed

6. Full length octant prototype constructed and beam-tested in August, 2007

7. EDR to be completed by end of October 2007

8. CASTOR sim-digi software in HCAL CMSSW-1_7 release

10. Resources approaching required level for completion. Missing ~ 150 k€

New Institutes are Welcome !

Currently working on:- test beam data analysis,- electronics, construction - software ( implementation in simulation of digi & reco…)- physics simulations, …..

Antwerp PMTs, FE, trigger, DAQ, funding; Electronics coordination

Athens Design, Q-plates, SW, MC, funding; Project coordination

CERN Beam test/EDR reports; SW-Physics coordination

Cukurova PMT testing, assembly

DESY FEA, construction, electronics, funding; Project coordination

JINR Dubna Mechanical design; Technical coordination

INR, Moscow Light guides & 2mm Q-plates

ITEP, Moscow Laser/LED calibration system

Northeastern Readout devices, MC, SW, construction

Collaborating Institutes & Tasks

CASTOR Calorimeter Design

Calorimeter (10λI): (2)EM + (12)HD sections, 224 channels

CASTOR Calorimeter on Support

2 (½) calorimeter sections

½ CASTOR

CASTOR Calorimeter Installation

HF

Collar

CASTOR in beam line: Collar platform with HF, Collar and Rotating shielding

HF

CASTORT1

T2

Collar

Rotating

Construction & Commissioning Schedule v1.6 (20-10-07)

CASTOR Prototype Construction/Assembly Study

Design: DUBNAConstruction: DESY, Northeastern

Construction of 32cm long, (½) calorimeter: 4 octants; (2) EM + (2) HD sections

Instrumenting one octant: (4) EM + (4) HD RUs

Front Rear

Octant container

Al plate

Prototype for BT 2007 Full length

Octant

EM section 4 channels

HAD section full length 24 chan.

1 3 31

Construction of Prototype

W-plate

Q-plate

CASTOR beam test 2007

Full-length octant prototype

PR

ELIM

INA

RY

day 2 day 14

PRELIMIN

ARY

HD1μ-

μ- Βeam 50 GeV

EM1

EM3

μ-

μ-

e- Beam

PRELIM

INAR

Y

σ/E

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an

ne

l

PRELIM

INAR

Y

π- Beam

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• Forward Physics spans a broad range of pp and HI high energy physics topics, from fundamental properties of QCD to new physics phenomena.

• Large cross sections ensure early publications on various topics.

• Discovery potential:- Beyond Standard Model (BSM): Large amount of missing transverse energy (MET)

- Higgs: Vector-Boson-Fusion (VBF): Two jets at forward/backward rapidities (pp→jj H X). Lower background than the dominant gluon-gluon fusion channel (see David’s talk).

- Exotics in HI Interactions: “Strangelets”, Disoriented-Chiral-Condensates (DCC)

• CASTOR calorimeter project is progressing fast:

- Lots of data taken in test beam; Analysis under way.

- Engineering design review scheduled for the 31st October. Document in final stage.

- Construction of calorimeter to start in November 2007.

- Aim & need to be in beam line as soon as LHC starts, to take advantage of low lumi runs.

New Institutes are welcome !

Summary