1 / 13

Tungsten plates on the market in 2010 ( Plansee – Cime Bocuze )

Tungsten plates on the market in 2010 ( Plansee – Cime Bocuze ). Pure W – W Composite Production Process Available Products Mechanical and Magnetic Properties Preliminary Ideas for a Prototype. CLIC physics/detector meeting 17 June 2009. W. Klempt CERN/PH. W – W Composite Material.

ayame
Download Presentation

Tungsten plates on the market in 2010 ( Plansee – Cime Bocuze )

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. Tungsten plates on the market in 2010( Plansee – Cime Bocuze ) • Pure W – W Composite • Production Process • Available Products • Mechanical and Magnetic Properties • Preliminary Ideas for a Prototype CLIC physics/detector meeting 17 June 2009 W. Klempt CERN/PH

  2. W – W Composite Material • Pure W is difficult to use: • pretty brittle • Difficult to machine • W composite materials: • Consist of W (≥ 90%) rest mixture of Fe, Ni, Cu … •  = 17 – 19 g/cm3 • Λ ≈ 10 cm, X0 ≈ 0.4 cm • Well established production procedure • Easy to machine • Price ~ 70 Euro/kg

  3. Production Process of Tungsten Composite Materials

  4. Product Range and Material Properties

  5. Mechanical Properties

  6. Magnetic properties of Densimet 180

  7. Magnetic properties of Densimet 180 μ

  8. Maximum size • Maximum size is given by size of the oven • Today a reasonable maximum size is about 1 ton of product. • In case of 10 – mm - thick plates the maximum size is about 500 mm x 800 mm after cutting and machining. • Rolling is complicate: hard phase (tungsten) mixed with ductile phase (CuNi). Brittleness increases!

  9. A promising technique - extrusion • Powder is mixed with a polyimide (nylon or similar). • The mixture is extruded. • First pre-sintering process (~800 oC). • Final sintering. • Option – rolling to straighten the plates – not to change thickness. Size: from 0.5 to 5 mm thickness now 200 mm x 600 mm (could be longer). Good mechanical properties but tried only with Densimet (NiFe). Next step: try it with Inermet (CuNi).

  10. Veto Calorimeter Beam Very preliminary ideas on a possible prototype MC calculations correct for W ? (invisible energy, neutrons) Depth ? Width ? Sampling rate, fraction?

  11. Shower Geometry (W 10mm, gap 8mm)Calculations done by C. Grefe Depth [mm] Length [mm] E [GeV] E [GeV] r [mm] L D r E [GeV]

  12. Very preliminary ideas on a prototype Start with a small size but build in an extendable way Production techniques for a later calorimeter should be used ADP or SiPM Wavelength shifter ~5 Scintillator tile 12 20 W plate ~30 ~480

  13. Conclusions • Non brittle Tungsten (alloy, W≥90%) plates are available • Mechanical properties ok, magnetic properties to be verified • Size today somehow small (< 0.3 m2), but can be developed • Envisage construction of a small but extandable prototype?

More Related