1 / 10

The cosmic trigger for the Large Prototype

The cosmic trigger for the Large Prototype. Th. Chaminade, P. Colas, K. Dehmelt, G. De Lentdecker, X. Janssen, Y. Kato, H. Kuroiwa, Y. Kudenko, T. Matsuda, F. Pierre, J.M. Reymond, S. Turnbull. The Large Prototype. Cosmics in March 08 Beam summer 08 7 panels mid 09. Wavelength shifting fiber.

yahto
Download Presentation

The cosmic trigger for the Large Prototype

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. The cosmic trigger for the Large Prototype Th. Chaminade, P. Colas, K. Dehmelt, G. De Lentdecker, X. Janssen, Y. Kato, H. Kuroiwa, Y. Kudenko, T. Matsuda, F. Pierre, J.M. Reymond, S. Turnbull P. Colas - LP cosmic trigger

  2. The Large Prototype Cosmics in March 08 Beam summer 08 7 panels mid 09 P. Colas - LP cosmic trigger

  3. Wavelength shifting fiber RECENT CHANGES Go to U-shape fiber groove Slab width changed to 167 mm (better extrusion) Scintillator slab Y. Kudenko P. Colas - LP cosmic trigger

  4. Mechanics can be simple: wrapped slabs maintained by bars (S. Hervé for the wrapping, a drawer to be indentified for the mechanical design) Tyvec diffuser to be ordered P. Colas - LP cosmic trigger

  5. Present layout: 12 slabs (+ 3 spare) Many possible combinations, for instance: 1 top + 1 bottom : central region of central panel 3 top + 1 bottom : radial tracks on central panels 3 top + 3 bottom : vertical tracks on most of the central region Requires a ‘bridge’ to support the magnet and its movement system. Mechanics to be discussed on site 5 slabs on top 3 slabs at bottom +4 perpendicular to limit the triggers to the detector length P. Colas - LP cosmic trigger

  6. P. Colas - LP cosmic trigger

  7. First step : hands on MPPC • Build a box with 1MPPC and one diode and a readout circuit (T. Chaminade, S. Turnbull) • Advices from J-Ch Vannel (Polytechnique), H. Kuroiwa and Y. Kato, and KEK/IPNS R&D P. Colas - LP cosmic trigger

  8. Second step : choose supplies • Must be accurate and stable, low-ripple, especially around 70 V. Candidates: • Keithley 2612, Keithley 237 • Modules from NIKHEF (Jos Steijger) in a Caen SY527 crate (K.Delmeht). But maybe not accurate enough • Need also 24 channels of PMT amplifiers (if long signal cables possible) and discriminators, coincidence units P. Colas - LP cosmic trigger

  9. Third step : design readout and temperature control (J.-M. Reymond) • 3 parts top, bottom parallel, bottom perpendicular. • In each box: thermistance, peltier device • In a central place : controler • Design mechanics, system, cables • Light-tightness vs accessibility P. Colas - LP cosmic trigger

  10. Conclusion and plans • Need a robust system: temperature control • Characterize MPPC, decide on supplies, Finalize design. • Slabs delivered from mid-January • Wrapping in Saclay 2 weeks after • Installation in February or March • Connexion to DAQ in March P. Colas - LP cosmic trigger

More Related