1 / 6

projective

Muon Chamber Alignment (Saclay) goal: absolute 30um on sagitta sofar: relative movements (better 30um). bol. bml. bil. Praxial =Proximity+Axial. projective. In-plane. ALIGNMENT=In-Plane + Praxial + Projective. Can we contribute?. BOL and NIKHEF.

selima
Download Presentation

projective

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Muon Chamber Alignment (Saclay)goal: absolute 30um on sagittasofar: relative movements (better 30um) bol bml bil Praxial =Proximity+Axial projective In-plane ALIGNMENT=In-Plane + Praxial + Projective Can we contribute?

  2. BOL and NIKHEF BOL (NIKHEF) 20um accurate, achieved!In-Plane x,y, scale, rotZ calibration to 20um effective (done, no direct proof) In-plane measures a lot. Most relevant: TORQUE (20urad) Can be studied in Cosmic ray stand (NOW, no global geometry needed) BIS BIS In addition: platforms for praxial and projective aligment glued (using Saclay tools)

  3. Datcha@NIKHEF • In-Plane Torque can be measured between chamber pairs • Vertical alignment rays • on praxial platforms • Projective platforms are not tested here (nor elsewhere), which limits the ‘power’ of this setup wrt alignment!!!

  4. A quick fit • Tracking with Cosray (efficiency, resolution + many studies needed, for example Tmax) • In-Plane (Torque) study • A few 100um check of praxial platforms + track sagitta’s (we have some ideas….) • Basic relative movements: possible, but done already years ago. • Get parameters out to tune ATLAS software! If we go for more: ASAP needed

  5. ASAP • ROOT/C++ package • Nominal geometry: AMDB database • New Geometry from alignment + temp sensors • Uses Muonbox or Moore • Thinkable that this migrates to Athena

  6. A ‘Quick-fit’ vs ASAP • Alignment=In-Plane+Praxial+Projective. Even with ASAP projective is not measured. So…. • ASAP is/was used in H8  Saclay responsibility. Why do it here? • Unlogical to go for alignment software, while we have experience with tracking reconstruction software. Get that in first. • Why use ASAP for stand at nikhef. Do it completely independently for H8 and get prepared for ATLAS!!! • Enough interesting stuff to do in cosmic ray stand without ASAP. • Get parameters out to tune ATLAS alignment software. Let Saclay develop this software. Note: this is my opinion + some statements to get discussion going

More Related