Ok, I do not know where the short cables ECL/lemo for the splitter-CFD
connection (neutrons) are or could be. The one in my room is the same
length as the other ones (i.e. the ADC's) please try to remember!
btw, do we have any spares or do we just hang on a show lace ?
today w/ chris we will label scaler cables. Chris has started writing
down the C tube serial numbers to match with the cards that tavi found.
I wish a happy, relaxing weekend to everybody... (particularly if you come
on shift)
-- t
________________________________________________________________________________
Tancredi Botto, phone: +1-617-253-9204 mobile: +1-978-490-4124
research scientist MIT/Bates, 21 Manning Av Middleton MA, 01949
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
On Fri, 18 Oct 2002, Octavian F Filoti wrote:
>
> Hi there,
>
> Since RTOF_Top&Bottom#15 was bad, in order to get a good data regarding
> L/R e-p coincidence rate, I have changed the trigger to a new one:
> new_elastic_tof_12-13.settings
> and I wanted to see protons in paddles 12 & 13 and electrons in 2, 3, 4
> and 5. The best run to look at it is #2208.
> >From there we see more electrons on Right Sector and more protons on Left
> Sector, but if we add them (i.e left_electrons+left_protons, etc.) and
> take the ratio we get L/R=99.78%.
> The same behaviour can be seen from run# 2211, with a different trigger:
> elastic_p_10-11.settings, where I wanted to see protons in paddles
> 10 & 11, while electrons in 4, 5, 6, and 7.
> I also used Scalers in finding the asymmetry, and use two different bits
> in XMLU (as Peter did). And I saw actually a good symmetry between L/R.
> Please see the logbook for more details!
> Also in run#2208 one can easily differentiate electrons and protons, but
> regarding TOF gain-matching I need Adrian to talk about it!
> Last part of the shift I have spent it on NB!
> First, good news, I have found the old NB logbook and the gain-matching
> tickets for CC (from photonis)!!!! Near blast05 machine!!!!!!!!!
> There we have got all HV values for the NB (and CC)tubes!
> Then, I investigated the Left NB signal (SEE NB logbook) and I can come up
> with the following:
> 1. 4 bars are not operational! Maybe limo connectors!
> 2. the first logic And (LNCoinAND) should be set: OR-AND, due to the
> fact that its inputs are B and C (to have coincidence between left and
> right PMT's)!
> 3. also for the cosmic signal, the logic And behaves like an OR, though it
> is set: AND-OR!!!!!!!!!
> 4. The Left Neutrons are in the trigger, but they don't work well! I took
> run#2213 with the trigger: LeftNeutron.settings and I have got some
> events, but, TANCREDI (may be in this way he can read this part of my
> message), did not use the ribbon cable I left it in front of his computer,
> instead he ran the LONG ADC ribbon cable from splitter to CFD, thus we've
> got a bad timing problem! Also after we change this cable we need to check
> the neutronOR signal from XMLU (physics event) with CS (to TS) to get the
> best trigger.
>
>
> -----------------------
> Octavian F Filoti
> Nuclear Physics Group
> Univ. of New Hampshire
> 9 Library Way
> Durham, NH 03824
> phone: (603)862-1691
> FAX: (603)862-2998
> email: ofiloti@unh.edu
>
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