Barrel Muon Alignment CMSHU csoport beszmol Barrel Muon

Barrel Muon Alignment CMS-HU csoport beszámoló Barrel Muon Alignment Kollaboráció This project is supported by Hungarian Research Fund (OTKA) NK 67974. 20100308 p. 1

Outline • Interventions during winter shut-down • Z movements – Comparison 2009 and 2010 measurements – 2010 measurements

During the shut down these MABs has been touched • Removed and then reinstalled MABs MAB -3/9 MAB -3/11 MAB +3/9 MAB +3/11 • Touched MABs (not removed) MAB +3/3 the detached fixation point MAB +3/3 One fixation point has been detached after the flood in CM MAB +3/5 One fixation point is bad. It is impossible to attach. We che

Z-bar measurements on YB± 2 What camera observes: IP ‘Real’ life: + ZLED 1 ZLED 4 ZLED 2 ZLED 5 ZLED 3 +φCMS on pos. Z side ZLED 6 + YB moves (with MAB) instead of Zf ork (changes sign in φ, but not in Z due to an other trafo. ) +φCMS on neg. Z side +ΔX -ΔY YB+2 +Δφ -Δφ to IP YB-2 -Δφ +Δφ to IP

Barrel shrinking due to B-field – Comparison YB-2 Movements of the Zbar LEDs vs time in the Z direction. • The reference measurement is run 152 (the reference meas of 2009) • The measurements from 2010. 02. 10. YB+2 15° 75° 135° 195° 255° • MABs -3/9, -3/11, +3/9, +3/11 has been reinstalled during the shut down! • MABs +3/3 & +3/5 has been touched during the shut down! • The maximum difference is 1 mm on those MABs which are not moved (-3/7, -3/1) 0 T 0. 5 T 315° 0 T 1 T 3 T 3 T 3. 8 T 0 T 0. 5 T 0 T 315° 1 T 3 T 3 T 3. 8 T

Phi movement due to B-field – Comparison YB-2 Movements of the Zbar LEDs vs time in the Phi direction. • The reference measurement is run 152 (the reference meas of 2009) • The measurements from 2010. 02. 10. YB+2 15° 75° 135° 195° • MABs -3/9, -3/11, +3/9, +3/11 has been reinstalled during the shut down! • MABs +3/3 & +3/5 has been touched during the shut down! • The maximum difference is 1 mm on those MABs which are not moved (-3/7, -3/1, +3/7) 255° 0 T 315° 0 T 0. 5 T 315° 1 T 3 T 3 T 3. 8 T 0 T 0. 5 T 0 T 1 T 3 T 3 T 3. 8 T

Barrel shrinking due to B-field – 2010 (2010. 02. 10. – 2010. 02. 12) YB-2 Movements of the Zbar LEDs vs time in the Z direction. • The reference measurement is the a maesurement on 10. Feb morning (run 884) • The measurements from 2010. 02. 10. YB+2 15° 75° 135° 195° 255° • MABs -3/9, -3/11, +3/9, +3/11 has been reinstalled during the shut down! • MABs +3/3 & +3/5 has been touched during the shut down! • Final closure at 3 T • Non-elastic deformations at 1 T 0 T 0. 5 T 315° 0 T 0 T 1 T 3 T 3 T 3. 8 T 0. 5 T 315° 0 T 1 T 3 T 3 T 3. 8 T

Phi movement due to B-field – 2009 (2010. 02. 10. – 2010. 02. 12) YB-2 Movements of the Zbar LEDs vs time in the Phi direction. • The reference measurement is the a maesurement on 10. Feb morning (run 884) • The measurements from 2010. 02. 10. • MABs -3/9, -3/11, +3/9, +3/11 has been reinstalled during the shut down! • MABs +3/3 & +3/5 has been touched during the shut down! YB+2 15° 75° 135° 195° 255° • Final closure at 3 T • Non-elastic deformations at 1 T 0 T 0. 5 T 315° 0 T 1 T 0 T 3 T 3 T 3. 8 T 0. 5 T 0 T 315° 1 T 3 T 3 T 3. 8 T

Phi movement of YB± 2 Interpretation of the measured data: • SAME behavior! • data on YB-2 compatible with restoration of the (gravity distorted) wheel shape due to magnetic field • behavior of YB+2 135°&315° are irregular (restoration + negative phi rot? ? )

Summary • We observed a non-elastic compression in Z again, however the wheels YB± 2 were not removed. • There are same behavior of the MABs in phi direction. • MAB +3/9 & +3/11 are in other position than 2009. They are shifted 6 mm in Z direction and 3 mm in phi direction.

Barrel shrinking due to B-field - 2009 YB-2 Movements of the Zbar LEDs vs run numbers (#) in the Z direction. YB+2 15° • All other movements are compatible with CRAFT 09 (numbers see on next slide) 75° Z displacement (mm) • Apart from the detach, movement due to field is the same Z displacement (mm) • ‘Jump’ between two 0 T status on MAB +3/1 (around Oct 15) – MAB has fallen 15° 75° 135° 195° 255° 0 T 0 T 3. 8 T Jump 315° 3. 8 T

Barrel shrinking due to B-field - 2009 YB-2 YB+2 Movements of the Zbar LEDs vs run numbers (#) in the Z direction. 15° • Same switch-on effect seen (~200 micron) 75° • on -3/3, 5, 7 & +3/7 there is a ~100 micron difference wrt previous 3. 8 T – evolution will be monitored Explanation for switch-on: • Top part of the wheel foreruns the bottom (friction) 135° Switch on effect Jump 135° 195° 255° 315° • Then wheel tilts back after a while (~1 d) 3. 8 T

Phi movement due to B-field - 2009 Movements of the Zbar LEDs vs run numbers (#) in the Phi direction. • There is an indication for detachment of MAB +3/3 (second one) • Slight drift for bottom MABs -- ? ? ? • Phi movements are compatible with CRAFT 09 • Phi movements are compatible with B induced restoration of gravity distortion (and slight movement due to off-axis – see next slide) YB-2 15° YB+2 15° Jump 75° 135° 195° 255° 315°

Phi movement of YB± 2 Interpretation of the measured data: none • data on YB-2 compatible with restoration of the (gravity distorted) wheel shape due to magnetic fie • behaviour of YB+2 135°&315° are irregular (restoration + negative phi rot? ? ) 2009. 10. 30. Magnet wrap up meeting 14

Adatgyűjtés A hardver – karbantartás után – rendben működik, folyamatosan üzemel. Néhány runt kiválasztottunk a stabil szakaszokban, amelyekre részletes analízis készül (folyamatban van). p. 15

Új az analízisben: teljes barrel rekonstrukció Korábban: Szuper. Szektor: 40 (50) DT 6 db független Szuper. Szektor (Szuper. Szektor 1 = Szektor 1+2, stb), amit a link-rendszer vagy track-ek alapján lehetett összevarrni Most: Saját adatok alapján össze tudjuk állítani a teljes barrelt (250 DT) Esetleg megér egy teljes szemináriumot. p. 16