[Halld-pid] Time-of-Flight Meeting, Thu. Feb. 14, 10 am, F326

[Alexander Ostrovidov]

On Thursday, February 14, 2013, Beni Zihlmann wrote:
> Hi Sasha,
> 
> I think you used the wrong distance  "d" to calculate the attenuation 
> length.
> in order to get your number of 89.7 of the third paddle in hte list I 
> need to
> use a d=84.66. You however claimed this is a short paddle in which cast I
> would need to use a d=42.33. but then I get  and attenuation of 44.8. So
> I think that the paddle with the short attenuation length are still the 
> long
> BUT narrow paddles.
> 
> Beni
> 

Beni,

Sorry, I forgot to mention that ADC data files are not pedestal-corrected.
Pedestal files were in a different directory. I have now placed them in
the same dirs as data files. And distance "d" between measurements points
is the same for all paddles - 84.66cm, or 1/3 of the normal paddle length. 
Of course, the short paddles have only 18.1cm left from the points of LED
placement to the closest PMT (distance "c") instead of the same 84.66cm 
for long ones.

Sasha