1. LCTPC Collaboration 2/17/2016Reasons for a TPC as main tracker in ILD1 Reminder of reasons for a TPC as main tracker in ILD

2. Reasons for a TPC as main tracker in ILD In the DBD, the advantages are written in a nutshell: 2/17/2016Reasons for a TPC as main tracker in ILD2 6.1.2.5

3. Reasons for a TPC as main tracker in ILD In the DBD, the advantages are written in a nutshell: 2/17/2016Reasons for a TPC as main tracker in ILD3 ① ② ③ ④ ⑤ Look here details!!! 6.1.2.5

4. 2/17/2016Reasons for a TPC as main tracker in ILD4 Independent observation: Francesco Forti at the EPS in Stockholm gave an overview talk about detector R&D

5. Reasons for a TPC as main tracker in ILD 2/17/2016Reasons for a TPC as main tracker in ILD5 ① Continuous tracking: ~100% efficiency with 3D points

6. Reasons for a TPC as main tracker in ILD 2/17/2016Reasons for a TPC as main tracker in ILD6 ① Continuous tracking:

7. 2/17/2016Reasons for a TPC as main tracker in ILD7 ① Continuous tracking/ Background removal:

8. 2/17/2016Reasons for a TPC as main tracker in ILD8 ② Minimum of material:

9. 2/17/2016Reasons for a TPC as main tracker in ILD9 ③ Topological time stamping, important for removal of beam background, cosmics, etc and for hooking up correct tracks to the silicon detectors external to the TPC (K. Fujii):

10. 2/17/2016Reasons for a TPC as main tracker in ILD10 Reasons for a TPC as main tracker in ILD ③ Topological time stamping/Backgrounds. Comment: In physics measurements simulated up to now, SM backgrounds have been included and have been shown not very sensitive to the type of central detector. However, before we get to the SM physics backgrounds, one has to remove backgrounds due to the effect seen on the slide 7, due to junk from the machine and due to cosmics. Junk from the machine and cosmics have not been included in many simulations and can be handled easily by a TPC...

11. 2/17/2016Reasons for a TPC as main tracker in ILD11 Reasons for a TPC as main tracker in ILD ③ Topological time stamping at CLIC (M. Killenberg):

12. Reasons for a TPC as main tracker in ILD 2/17/2016Reasons for a TPC as main tracker in ILD12 ④ Non-pointing Tracks (`be ready for the unexpected!´): hep-ex/0203024v2

13. Reasons for a TPC as main tracker in ILD 2/17/2016Reasons for a TPC as main tracker in ILD13 ④ Non- pointing tracks:

14. Reasons for a TPC as main tracker in ILD 2/17/2016Reasons for a TPC as main tracker in ILD14 ④ Non- pointing tracks:

15. 2/17/2016Reasons for a TPC as main tracker in ILD15 Reasons for a TPC as main tracker in ILD ⑤ dE/dx: 8 examples from Aleph (out of ≈ O (10²) times dE/dx was used in Aleph papers; similar ratios for Opal and Delphi papers)

16. 2/17/2016Reasons for a TPC as main tracker in ILD16 Reasons for a TPC as main tracker in ILD ⑤ dE/dx: 1 example from the ILD meeting in Oshu Japan 6-9Sept.2004

17. 2/17/2016Reasons for a TPC as main tracker in ILD17 Reasons for a TPC as main tracker in ILD ⑥ Comment about software The arguments up to now have been related to hardware mainly. Software has become so fast and powerful, that the reasons why we don‘t need „continuous tracking“ are given. Of course powerful software is good, but powerful hardware is also good. A combination of both is even better. It allows the possibilities of cross-checks and redundancy, both which are important in our business.