FCAL Workshop in Cracow

February, 12 2006 INP PAN

FCAL Workshop in Cracow

W. Lohmann, DESY

The BCD (Baseline Configuration Document)

The next calendar dates

Where we are with FCAL


The BCD

Executive Committee for Baseline ConfigurationGDE Director

Barish

Regional Directors Dugan – Americas

Foster – EuropeTakasaki – Asia

Accelerator LeadersYokoya - Asia

Raubenheimer - AmericasWalker - Europe

Responsible for decisions and documentation for the Baseline Configuration Document

(BCD)

GDEExecutiveCommittee


ILC Parameters


The BCD

The Baseline Machine (500GeV)

The 1 TeV upgrade


2 Interaction Regions

Two Detectors, because:

•Confirmation and redundancy•Complementary Collider options•Competition•Efficiency, reliability•Historical lessons

We have to contimue with two design options!2 mrad and 20 mrad


GDE groupsMachine design, Cost …..

Siting, civil construction …….

Physics, Detectors

- J. Brau (America) - F. Richard (Europe)- H. Yamamoto (Asia)

……….

Area subsystem leads

A. Seryi, H. Yamamoto (MDI panel) D. Angal-Kalinin

Beam delivery system


The next calendar dates

EUDET kick-off meeting in Hamburg, February 15-17.

LCWS Bangalore, March 9-13.

Physics Research Committee, May 11-12

ECFA WS, Valencia, November, 2006

We have to present our plan for the next 4 years

LDC outline document, presentations

A written report and a presentation are expected

prepare ourselfs, FCAL meeting before?


Where are we with FCAL

-We worked out an advanced design for zero or small crossing

angle;-this was accepted and acknowledged in Snowmass and

Vienna(Several talks by H. Abramowicz, K. Afanaciev,C.Grah,V.Drugakov, A.Elagin, B. Pawlik, A. Sapronov)-the performance (resolutions, efficiencies, biasas) are

understood from simulations for partly realistic detectors

-the backscattered background ( into the central detector part) is estimated

- Some studies are done for the 20 mrad version (beamstrahlung background, systematics of beamposition)


•Fast Beam Diagnostics

•Detection of Electrons and Photons at very low angle –

extend hermeticity

IP

VTX

•Measurement of the Luminosity

with precision (<10-3) using Bhabha scattering

BeamCal

FTD

L* = 4m

300 cm

LumiCal: 26 < < 82 mradBeamCal: 4 < < 28 mradPhotoCal: 100 < < 400 rad

Very Forward DetectorsBeamstrahlung

Depositions:20 MGy/yearRad. hard sensorse.g. Diamond/W BeamCal

LumiCal

Silicon/W sandwich

R&D for ILC (DESY PRC R&D 02/01):Instrumentation of the Very Forward Region of the ILC Detector

BeamCal


A few topics to be thought

Selection of Bhabha events:

Energy selection cut

At which energy this cut has to be put?-Theoretical uncertainty -Energy scale uncertainty



The Bhabha cross section depends on the polarisation

How well is this understood?-higher order corrections - considered in the Monte Carlo



Electron detection efficiency:

Algorithm relies on constant bunch charge

Look on Dumping Rings

How stable is this mechanism?-Bunch-to-bunch fluctuations (Contact to machine people )


20 mrad design

Changes within LDC:

-TPC is shorter-HCAL should cover smaller angles-LumiCal aligned with or in front of ECAL -Montage-friendly

-Background on LumiCal ?- Background in the inner Detector?


What has to be done:

We need a design for 20 mrad crossing angle-new geometry-repetition of many simulations-studies of backgrounds, beamstrahlung, backscattered into the central detector We have to understand Bhabha phenomenology in more details-Status of the theory and generators- How influence radiative effects for a given detector the uncertainty of the measurement- Optimised segmentation/structure for LumiCal- Realistic readout scheme


What has to be done:

Sensor and Readout

-Continuation of diamond studies (more samples with promising diagnostics, linearity, homogeneity, high radiation doses.)-Si sensor studies (to learn to work with them).-Si sensor radiation test.-Assembly of full sensor planes prototype test.-Readout electronics design for the prototype O(1000) channels.-Concept for the readout electronics-Concept Design for the ‘fast readout’ and fast diagnostics (related to Eurotev).


This meeting at INP

-Reports on many topics mentioned

-Discussions on ‘critical’ Issues 20 mrad design more realistic simulations prototyps and testbeam electronics concept preparation of the EUDET kick-offmeeting Lets make a WORKshop and see at theend where we’ll go

FCAL Workshop in Cracow

Documents

Transcript of FCAL Workshop in Cracow