Forward region studies of the CLIC detector Konrad Elsener for the LCD @ CERN team

SLAC SiD workshop Konrad Elsener (CERN) 1

Forward region studies of the CLIC detector

Konrad Elsener

for the LCD @ CERN team

C L I CC L I C

5 May 2009 SLAC SiD workshop Konrad Elsener (CERN) 2

C L I CC L I C

K. Elsener - CLIC CTC meeting 2

LCD @ CERNLinear Collider Detector Project at CERN

Who are we ?Lucie Linssen (project leader)Dieter Schlatter Konrad ElsenerPeter Speckmayer (Fellow)Christian Grefe (Doct)Andre Sailer (Doct)Marco Battaglia (PDSA)+ part time help from CERN staff, + visitors+ CERN contribution to EUDET

LAPP Annecy ETH Zurich STFC-RALJean-Jacques Blaising Alain Hervé Marcel StanitzkiJan Blaha (Doct) Jan Strube


C L I CC L I C


LCD @ CERNLinear Collider Detector Project at CERN

What is our goal ?

We are working towards a linear collider detector which will operatein an energy range (CM) from 500 GeV to 3 TeV .

Working together with the ILC concepts (SiD, ILD, 4th) and with detectorcollaborations (LC-TPC, EUDET, FCAL, CALICE) – next is DevDet .

In a concerted effort with the individual concepts, we work towardsdescribing the possible changes or upgrades to the ILC conceptsto make them compatible with multi-TeV energies and CLIC beam conditions.


C L I CC L I C


ILC ≠ CLIC: Forward region studies

Crossing angle 14 mrad 20 mrad

beam-beam effects 3 TeVbunch spacing 374 ns 0.5 ns

solenoid field (?), anti-DiD (?); L* and FF quads ...

-> design of forward region: ILC ≠ CLICbackground in forward calorimeters(+ “details” for luminosity measurement)-> background in vertex + tracking detectors

(+ in-direct background from BDS + post-collision line)


C L I CC L I C


Example : ILD concept


C L I CC L I C




C L I CC L I C




C L I CC L I C


500 GeV -> 3 TeV

• Aim to have a detector which operates well over the full energy range from 500 GeV to 3 TeV

• Vertex detector + vacuum pipe will certainly have to be changed during the upgrade to 3 TeV

• Forward calorimeters might have to be replaced (under study)


C L I CC L I C


500 GeV -> 3 TeV

• NOTE that at 3 TeV, “top” physics is more forward than at 500 GeV

• impact on tracking and calorimetry

• impact on “aspect ratio” (barrel vs. FW, solenoid), etc.

• much physics simulation work to be done

• too early to decide on “boundaries”


C L I CC L I C


Example central region: ILD

2400 mm


C L I CC L I C


Example forward region: ILD

3475 mm


C L I CC L I C


Example forward region: ILD


C L I CC L I C


CLIC detector (2) – ILD’ishAndre Sailer, CERN

Use the full ILD detector model (MOKKA – GEANT4)

- modified crossing angle to 20 mrad- modified solenoid field to 4 T (anti-DiD is modified automatically)- modified vertex detector inner-most layer to R = 30 mm (adjust other layers manually)- added the ILC FF quad (supercond. twin-quad) + vac.

so far, no change to LumiCal or BeamCal dimensions


C L I CC L I C



3TeVGuineaPig 150’000 incoherent pairs(300’000 particles)

-> 88% of 1 BX

BG hits in the ILDvertex detector(3 double-layers)w/origin of BG hit


C L I CC L I C




-> 88% of 1 BX

origin of BG hitsin tracking detectors


C L I CC L I C



add 10 cm of graphite


C L I CC L I C


CLIC detector – a first look at LumiCalIftach Sadeh, Tel Aviv University

GeV

3 TeV, 0 mrad crossing, 4 T field

Energy deposition in X-Y,integrated over full depth of CLIC-style LumiCal(40 layers W-Si calorimeter)

10 bunch crossings, 3 TeV- shows the segmentationof the LumiCal (Outer Radius = 35 cm)


C L I CC L I C


CLIC detector – a first look at LumiCalIftach Sadeh, Tel Aviv University

Hits on front-face of LumiCal (-> VTX background): CLIC 3 TeV, 20 mrad crossing,

4 T field, no DiD, 10 BX


C L I CC L I C


Next steps for LumiCal

visitors from FCAL collaboration, Tel Aviv, Belgrade, Bucharest

Account for the fact that BG from 312 BX will be overlayed in LumiCal

Effect of switching off anti-DiD

Change LumiCal dimensions (persently ILD values)

Beam-Beam effect on Bhabha events (BHSE) – systematics on luminosity(with D. Schulte)

Physics background and LumiCal performance

Look at non-perfect collisions


C L I CC L I C


CLIC detector forward region – next

Effect of switching off anti-DiD (change in background at VTX, TPC ...)

Energy deposition in BeamCal (radiation hardness of sensors)

BeamCal useful for beam monitoring ? (with D. Schulte)

Change of BeamCal dimensions (if needed)

Introduce a (conical?) mask between BeamCal and LumiCal (if needed)

Look at neutrons (connect to work on BG from post-collision line, M. Salt, Cockcroft Inst.)

Look at non-perfect collisions for BeamCal


C L I CC L I C


LCD project plan -> 2014, and MDI

Detector solenoid – field, dimensions (aspect ratio)(SC conductor R&D)

Contribute to detailed design of forward region / integration(simulations, work on radiation hard sensors, electronics & readout, etc.)

Engineering aspects e.g. push-pull, stabilisation, vibrations,integration, services etc. -> EN + GS departments, vacuum pipe + equipment -> TE department


C L I CC L I C


SUMMARY

In PH department, the new LCD project has started- Linear Collider Detector for 500 GeV to 3 TeV .

A significant part of the LCD project concerns the forward region and issues closely related to the beam• we get a lot of help from Daniel (and we need it!)

Too early to define “boundaries” – 12m, XXm, YYm

Active participation in, and work on, MDI issues is part of our project plan(Konrad Elsener, André Sailer, ...).


C L I CC L I C


spares


C L I CC L I C


Angular coverage of ILD forward calorimeters (THETA values given)

IP


C L I CC L I C




-> 88% of 1 BX

BG hits in the ILDtracking detectorscolor: indicates detector


C L I CC L I C




-> 88% of 1 BX

Origin of BG hits intracking detectors

Date post:	22-Feb-2016
Category:	Documents
Upload:	claus
View:	43 times
Download:	0 times

Forward region studies of the CLIC detector Konrad Elsener for the LCD @ CERN team

Documents