Re: FEU84-3

[Eugene Chudakov <gen@jlab.org>]

Fernando,

I found a reference from a talk concerning the COMPASS hadronic calorimeter.
They quoted 12-18ns for the rise time and the full width of 40-50 ns on 10%
of the amplitude. I hope, for the rise time people are using the convention 10-90%.

We can find out more info in a day or so.

Eugene

------------------------------------------------------
Eugene Chudakov
phone (757) 269 6959  fax (757) 269 5703
Thomas Jefferson National Accelerator Facility
12000 Jefferson Ave, Newport News, VA 23606 USA

On Mon, 7 Apr 2008, Fernando J. Barbosa wrote:

> Hi Elton,
>
> I checked a few publications referencing the FEU84-3 PMT and I saw a
> rise time of less than 10 ns (~8 ns). This agrees with an conversation I
> had with Paul Smith quite a long time ago (in fact, one note from Paul
> shows a rise time of less than 10 ns with the fADC prototype). The
> figures presented on Friday by Mihajlo showed a rise time of about 30
> ns. This discrepancy may be due to the light source. Do you have a spec
> sheet on the FEU84-3? I found one on the web in Russian but didn't seem
> to have a spec for the rise time.
>
> Regards,
> Fernando
>