[Rich] RICH test at CERN

[Valery Kubarovsky]

Congratulation to Patrizia and the RICH group!
Very impressive results.
Valery

> Dear all,
>
> our test beam at CERN is over. We just  dismounted our test apparatus and
> are ready to go back home.
>
> We will make a report of our 2 weeks of work in our next RICH meeting. For
> the moment enjoy the slides that you find in attachment.
> The rings are for pions and are not simulations! This is just a very
> preliminary analysis of our data.
> The 2 rings drawn in slide 2 and 3 represent  the expected indetermination
> mainly due to the unavailability of an appropriate finger detector for the
> event trigger definition and the determination of the particle trajectory
> at the level of ~ mm (our event was defined within more than 10x10 mm^2).
> Also the proximity gap was too small, only 35-40 cm. Unfortunately we
> hadn't time to build a black box with the correct dimensions so we had to
> use the same we are using in the lab for the characterization of the
> MA-PMT with the laser.
>
> We couldn't see the kaons in the experimental conditions we worked but
> these results are more than expected.
>
> We learned a lot during this test, not only about the response of the
> H8500 and R8900 in experimental conditions (which was our goal) but also
> about the electronics we plan to use in the real detector, the aerogel
> with different refractive index (also how to handle it
I was able to
> destroy one tile without doing apparently nothing wrong!), and more

>
> More results will come once we will start to analyze our data.
>
>
> Regards
>
> Patrizia for the RICH testbeam team:
>
> Luca Barion
> Marco Contalbrigo
> Vincenzo Lucherini
> Marco Mirazita
> Luciano Pappalardo
> Matteo Turisini
>
> and the external support of Evaristo Cisbani, Aldo Orlandi and Angelo
> Viticchie'
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