[Rich] RICH test at CERN

[Evaristo Cisbani]

Superb!

Congratulation.

Evaristo

On Thu, 2011-07-21 at 10:33 +0200, patrizia rossi wrote:
> 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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-- 
 Evaristo Cisbani                      office : +39 06 4990 2847 
 Istituto Superiore di Sanita`         lab    : +39 06 4990 2347
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