1. Preparation for tile production in Russia
AHCAL Meeting
DESY
Preparation for tile production in Russia
M.Danilov
LPI and MEPhI

2. A mould for two tiles have been produced
Temperature is kept constant within 1 degree by water cooling

3. Mould after kickout of tiles

4. Tiles with plastic leads from the mould
Photo by Felix Sefkow

5. Tiles have been measured with a micrometer in corners and in a center
Thickness at corners varies from 2.97 to 2.99 mm. Tiles from right mould ~10ϻm thicker
Thickness at centers is ~ 20 ϻm smaller (~2.96 ϻm ). Only 8 tile have been measured
Side sizes vary from 2.58 to 2.61mm (spread +/- 15 ϻm ) (40 measurements)
Tile pass through a 3.0mm slit – i.e. they are flat (16 measurements).

6. Row of tiles

7. Light propagation through tiles
Light injected into a dimple
Other dimples and sides are shining
Light injected through flat surface -> darkness

8. Light propagation through tiles

9. Summary Production rate is 1 tile per minute
Light yield measurements will be done soon by Erika
We plan to produce 28 thousand tiles
by the end of February