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<div class="moz-cite-prefix">Hi all,<br>
<br>
I think for the electron in FD the 300 MeV numbers for both
PCAL+EC and for PCAL alone should be fine.Also the 10 MeV in ECAL
should be fine. <br>
FX's 425 MeV for PCAL+EC may be too tight and may cut into good
low x DVCS events. <br>
<br>
For the other hadron triggers the PCAL threshold of 15 MeV should
be fine (mips will deposit 30 MeV in 15 layers of scintillators of
1cm thinkness).<br>
<br>
Volker<br>
<br>
<br>
<br>
<br>
On 11/9/18 12:07 PM, Francois-Xavier Girod wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAOKxh440-fvm3VPgrdm1PsoBZ3CPLP1=UX97VfrWM_0m=XzMkQ@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<div dir="ltr">Dear Valery, all
<div><br>
</div>
<div>I can give the following numbers: for the selection of
electron momentum > 2 GeV/c the minimum energy deposited in
PCAL+ECAL is 425 MeV at 2.5 sigma selection below mean value.
The same value for PCAL is 220 MeV</div>
<div><br>
</div>
<div>I am not sure which other numbers you need for PCAL and
ECAL thresholds. Please let me know</div>
<div><br>
</div>
<div>Best regards</div>
<div>FX</div>
<div><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr">On Fri, Nov 9, 2018 at 11:56 AM Valery Kubarovsky
<<a href="mailto:vpk@jlab.org" moz-do-not-send="true">vpk@jlab.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div>
<div
style="font-family:arial,helvetica,sans-serif;font-size:12pt;color:#000000">
<div>Hi All:</div>
<div>Please estimate the desired thresholds for PCAL+ECAL
energy for all 4 thresholds.</div>
<div>Thanks,</div>
<div>Valery</div>
<div><br>
</div>
<div><br>
</div>
<hr id="m_-7352567069147429017zwchr">
<div>
<blockquote style="border-left:2px solid
#1010ff;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt"><b>From:
</b>"Volker Burkert" <<a
href="mailto:burkert@jlab.org" target="_blank"
moz-do-not-send="true">burkert@jlab.org</a>><br>
<b>To: </b>"Valery Kubarovsky" <<a
href="mailto:vpk@jlab.org" target="_blank"
moz-do-not-send="true">vpk@jlab.org</a>>, "Viktor
Mokeev" <<a href="mailto:mokeev@jlab.org"
target="_blank" moz-do-not-send="true">mokeev@jlab.org</a>><br>
<b>Cc: </b>"clas12 rgk" <<a
href="mailto:clas12_rgk@jlab.org" target="_blank"
moz-do-not-send="true">clas12_rgk@jlab.org</a>>,
"annalisa dangelo" <<a
href="mailto:annalisa.dangelo@roma2.infn.it"
target="_blank" moz-do-not-send="true">annalisa.dangelo@roma2.infn.it</a>><br>
<b>Sent: </b>Friday, November 9, 2018 11:51:55 AM<br>
<b>Subject: </b>Re: Range of the scattered electron
energies<br>
</blockquote>
</div>
<div>
<blockquote style="border-left:2px solid
#1010ff;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt">
<div class="m_-7352567069147429017moz-cite-prefix">I
think Victor calculated a sharp threshold without
considering the resonances have broad widths for
hybrids. <br>
<br>
I suggest the following, i.e. W thresholds are above
3 GeV in either case. <br>
<br>
7.5 GeV: E'min>2.0 GeV<br>
6.5 GeV: E'min>2.0 GeV<br>
<br>
For the upper E' I suggest to lower the numbers so
that resonance width are taken into account.<br>
7.5GeV: E'max< 7.0 GeV <br>
6.5GeV: E'max < 6.0 GeV <br>
<br>
Thresholds may have to be adjusted for energy
leakage. <br>
<br>
Volker<br>
<br>
<br>
<br>
On 11/9/18 11:16 AM, Valery Kubarovsky wrote:<br>
</div>
<blockquote>
<div
style="font-family:arial,helvetica,sans-serif;font-size:12pt;color:#000000">
<div>Hi All:</div>
<div><br>
</div>
<div>The scattered electron energy in the mail
below differs by a factor of 4 from the table
that was presented today (see attached
screenshot). I believe that we have to define
the trigger parameters more precisely.</div>
<div><br>
</div>
<div>Regards,</div>
<div>Valery</div>
<div><br>
</div>
<div><br>
</div>
<hr id="m_-7352567069147429017zwchr">
<div>
<blockquote style="border-left:2px solid
#1010ff;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt"><b>From:
</b>"Viktor Mokeev" <a
class="m_-7352567069147429017moz-txt-link-rfc2396E"
href="mailto:mokeev@jlab.org"
target="_blank" moz-do-not-send="true"><mokeev@jlab.org></a><br>
<b>To: </b>"clas12 rgk" <a
class="m_-7352567069147429017moz-txt-link-rfc2396E"
href="mailto:clas12_rgk@jlab.org"
target="_blank" moz-do-not-send="true"><clas12_rgk@jlab.org></a><br>
<b>Cc: </b>"Volker Burkert" <a
class="m_-7352567069147429017moz-txt-link-rfc2396E"
href="mailto:burkert@jlab.org"
target="_blank" moz-do-not-send="true"><burkert@jlab.org></a>,
"annalisa dangelo" <a
class="m_-7352567069147429017moz-txt-link-rfc2396E"
href="mailto:annalisa.dangelo@roma2.infn.it"
target="_blank" moz-do-not-send="true"><annalisa.dangelo@roma2.infn.it></a>,
"Valery Kubarovsky" <a
class="m_-7352567069147429017moz-txt-link-rfc2396E"
href="mailto:vpk@jlab.org" target="_blank"
moz-do-not-send="true"><vpk@jlab.org></a><br>
<b>Sent: </b>Friday, November 9, 2018
10:22:06 AM<br>
<b>Subject: </b>Range of the scattered
electron energies<br>
</blockquote>
</div>
<div>
<blockquote style="border-left:2px solid
#1010ff;margin-left:5px;padding-left:5px;color:#000;font-weight:normal;font-style:normal;text-decoration:none;font-family:Helvetica,Arial,sans-serif;font-size:12pt"> Dear
Colleagues,<br>
<br>
I computed the range of the scattered
electron energies for Q^2=0 and at the W
interval from 1.5 GeV (W_min) to 2.5 GeV
(W_max), which is the range of our physics
interest.<br>
<br>
For the beam energy of 7.5 GeV the energy
range of the scattered electrons should be
from 4.64 GeV to 6.78 GeV.<br>
For the beam energy of 6.4 GeV the energy
range of the scattered electrons should be
from 3.54 GeV to 5.67 GeV.<br>
<br>
The details of the evaluations are in the
attached file.<br>
<br>
Best Regards,<br>
Victor<br>
<br>
PS For Q^2>0.1 GeV^2 the actual value of
Q^2 becomes comparable with the \nu in the
attached file and, therefore, should be taken
into account. In comparison with the photon
point, actual Q^2 value should increase \nu
and decrease the range of the scattered
electron energies.<br>
</blockquote>
</div>
</div>
</blockquote>
<p><br>
</p>
<br>
</blockquote>
</div>
</div>
</div>
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</blockquote>
</div>
</blockquote>
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