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Bug #1792

Tracker

Added by Overton, Edward over 8 years ago. Updated over 7 years ago.

Status:
Closed
Priority:
Normal
Assignee:
-
Category:
Tracker
Target version:
Start date:
10 November 2015
Due date:
% Done:

100%

Estimated time:
Workflow:
New Issue

Description

In order to better understand the x flip in the tracker some investigations have been done.

We looked at the channels which constitute a space point (local tracker coordinates):
0 = 102 (alpha=-6.5)
1 = 166 (alpha=100)
2 = 48 (alpha=-93)

Alpha is the distance from the plane centre. The space point generated in this case is at x = -4.4, y = 103.54.

Plane 0 is the only plane which has a consistent x position. (Durga & Chris Heit think that plane 2 should give x). We looked at other space points and plane 0 gave x each time.

Using Geoffs note: http://micewww.pp.rl.ac.uk/attachments/3214/final_station_con_map_V.ppt we determined the location of the space point in the MICE global right handed coordinate system to be -6.5. Note that there is a x-flip between local tracker coordinates and the global coordinates. So the spacepoint x location appears to be flipped.

Note I assume by geoffs comment "View of the station onto the polished face of the connector" that means that the polished face is pointed out of the page. This indicates that the page is pointing upstream in the upstream. By this I mean the normal vector of the printed page is pointing upstream from the tracker to tof1.

I need to clarify this with Geoff.


Files

07497_offline.tar (571 KB) 07497_offline.tar Rajaram, Durga, 13 November 2015 14:21
07498_offline.tar (1020 KB) 07498_offline.tar Rajaram, Durga, 13 November 2015 14:21
07500_offline.tar (395 KB) 07500_offline.tar Rajaram, Durga, 13 November 2015 14:21
07501_offline.tar (400 KB) 07501_offline.tar Rajaram, Durga, 13 November 2015 14:21
TrackerMapTest.ods (25.1 KB) TrackerMapTest.ods Overton, Edward, 13 November 2015 14:27
MC_unchanged_upstream.png (11.7 KB) MC_unchanged_upstream.png Heidt, Christopher, 16 November 2015 21:07
MC_unchanged_downstream.png (35.5 KB) MC_unchanged_downstream.png Heidt, Christopher, 16 November 2015 21:07
MC_changed_upstream.png (26.8 KB) MC_changed_upstream.png Heidt, Christopher, 16 November 2015 21:07
MC_changed_downstream.png (35.5 KB) MC_changed_downstream.png Heidt, Christopher, 16 November 2015 21:07
20151114_163006_2.jpg (1.18 MB) 20151114_163006_2.jpg Heidt, Christopher, 16 November 2015 21:15
20151114_162935.jpg (2.36 MB) 20151114_162935.jpg Heidt, Christopher, 16 November 2015 21:15
Tracker1.dat (8.43 KB) Tracker1.dat Heidt, Christopher, 16 November 2015 21:48
Tracker0.dat (8.42 KB) Tracker0.dat Heidt, Christopher, 16 November 2015 21:48
map_file (162 KB) map_file Heidt, Christopher, 16 November 2015 21:48
upstream_MC_recon_position_residual.pdf (15.2 KB) upstream_MC_recon_position_residual.pdf Upstream position residuals from truth Hunt, Christopher, 17 November 2015 11:55
upstream_MC_recon_momentum_residual.pdf (22.9 KB) upstream_MC_recon_momentum_residual.pdf Upstream momentum residuals from truth Hunt, Christopher, 17 November 2015 11:55
downstream_MC_recon_position_residual.pdf (16.2 KB) downstream_MC_recon_position_residual.pdf Downstream position residuas from truth Hunt, Christopher, 17 November 2015 11:55
downstream_MC_recon_momentum_residual.pdf (30.1 KB) downstream_MC_recon_momentum_residual.pdf Downstream momentum residuals from truth Hunt, Christopher, 17 November 2015 11:55
trkswfix.odt (42 KB) trkswfix.odt Notes on fix Overton, Edward, 18 November 2015 14:52
upstream_w_mom.pdf (19.2 KB) upstream_w_mom.pdf Heidt, Christopher, 01 December 2015 20:32
momentum_mc.pdf (23.9 KB) momentum_mc.pdf Heidt, Christopher, 01 December 2015 20:32

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