1. Ron Settles MPI-Munich LCTPC integration model
TPC Parameters for ILD Integration/Optimization Continuation of discussion from 12 August 2010
Ron Settles MPI-Munich LCTPC integration model

2. Integration/optimizaiton iterations:
--Iteration # 1 at wpmtg103 on was only looking at the effect of the electronics (cables and pipes), using Antoine’s ROB as a basis (263mm x 282mm containing 16 x 16 S-Altros).
--Iteration # 2 wpmtg104 on :
--a) The ‘TPC envelope’ required by the MDI group must be included in the thinking.
--b) exchange with Dan; we concluded that it is better if the basic unit is smaller in size and number of channels.
--Iteration #3: the ‘final’ proposal at wpmtg105 on
--Iteration #4: see wpmtg106 on
--Iteration #5: see wpmtg108 on
--Iteration #6: see wpmtg111 on
--Today, pick up where we left off 3 months ago
Ron Settles MPI-Munich LCTPC integration model

3. Ron Settles MPI-Munich LCTPC integration model
--Where were we three months ago?
Ron Settles MPI-Munich LCTPC integration model

4. Ron Settles MPI-Munich LCTPC integration model
3 months ago
Hi Steve,
In a nutshell, the questions are:
-has there been a 'final' decison ('final' meaning have you already
started simulations with new parameters?) about the endcap X_0%?
-has there been a 'final' decision about using a better formula for the
\sigma_z(z,\theta)? i.e., including the polar-angle effect?
-has there been a 'final' decision about improved 2-hit resolution
formulae for the radial and drift directions?
Cheers,
Ron
Answer Aug.2010: no, we still have time to decide.
Now, November 2010: Time’s up!!!
Ron Settles MPI-Munich LCTPC integration model

5. Integration: hardware/software model iteration # 7 today 20101125
--What happened since Iteration # 6 three months ago?
PRC2010 report for 11 October 2010 caused a 6-week break
PRC2010 gives a status report on all LCTPC activities:
See under “Linear collider things”, click on PRC2010 report, version#19
See also presentations at ILCWS Geneva 18 – 22 October
Ron Settles MPI-Munich LCTPC integration model

6. Integration: hardware/software model iteration # 7 today 20101125
under “Linear collider things”, click on PRC2010 report, version#19
see DBD preparations (Section 2.3 on p.33) for
Dan’s studies
AEP granularity
Fieldcage
S-Altro FEC-MCM proposal by Lund
Cooling, power pulsing studies
Software/reconstruction
Ron Settles MPI-Munich LCTPC integration model

7. Ron Settles MPI-Munich LCTPC integration model
# Channels
--64 pads/S-Altro --16 S-Altro/ROB1 (Antoine) -- 8 ROB1/ROB8  pads/ROB pads/ROB ROB8/endcap pads/endcap
Must be updated by Lund for new FEC/MCM layout
ROB sizes will vary slightly across the endcap, depending on the shapes of the different ROBs. ROB1 (Antoine, to be revised for Lund FEC/MCM layout) and ROB8 (Dan/LP-sized modules) are starters since 8000 pads per module seems about right, and we are gaining experience with that size and # channels at the LP.
Ron Settles MPI-Munich LCTPC integration model

8. Ron Settles MPI-Munich LCTPC integration model
X_0 Thicknesses (slide from mtg103
Must be updated by Lund for new FEC/MCM layout
Sum of these plus S-Altros ~ 5 % X_0 Dan estimated at last meeting the space-frame thickness ~ 8 % X_0 for the LP size. We don’t know yet how this translates to the LCTPC size. Cooling (my guess, needs confirmation) ~ 2% X_0 Cable layout --- work in progress --- but it looks like the above X_0 may be doubled due to low voltage supply.
R E M I N D E R
Must be updated by Dan’s
latest studies
In PRC2010 report, endcap thickness
of 25% X_0 (upper limit) was written
until more info on LV, FEC/MCM and
AEP is available.
Ron Settles MPI-Munich LCTPC integration model

9. Ron Settles MPI-Munich LCTPC integration model
Must be updated by Dan’s latest studies. Dan won’t be joining today (holiday
in the US), so recalling his slides from last meeting #117…
… and an to Jan and me yesterday, his conclusion is that it does not help to
make the endcap thicker than 100mm. We should have a final discussion on
this at the next meeting #119, where I will also present some ideas about the
tolerance on the endcap deflection.
Ron Settles MPI-Munich LCTPC integration model

10. Part 1 of 2008 eMail to ild-optimization maillist:
Where we left off: Changes in 2010?
50^2=25^2+30^2+30^2
=perf.electr.^2+real.electr.^2+Bfield^2
 No change
Momentum resolution little affected by 6mm or 4mm pad-height
 No change
Ron Settles MPI-Munich LCTPC integration model

11. This formula was checked by Jan (and Takeshi?)
Part 1 of to ild-optimization maillist:
Correction to a mistake in the mtg#108 formula:
sigma_z(z,θ)^2≈[3*(ΔT*v_drift)^2/12N_eff] + [(Cd^L)^2*z + (h/tanθ)^2/12]/(N_eff/sinθ)
≈[perf.electr.^2 +real.electr.^2+angle_zero-drift^2] + [diff^2+angle^2]
= 218microns(z=0cm,θ=90deg) to 790microns(z=225cm,θ=90deg)
= 218microns(z=0cm, θ=15deg to 832microns(z=225cm,θ=15deg)
Old formula = 400 (z=0) to 1265microns(z=225cm)
This formula was checked by Jan (and Takeshi?)
Ron Settles MPI-Munich LCTPC integration model

12. Ron Settles MPI-Munich LCTPC integration model
What else? The latest Table 1.1 in the PRC report, version #19:
In principle the two-track resolution in rphi and rz as a function of angle...
Ron Settles MPI-Munich LCTPC integration model