[Clas12_first_exp] Fwd:Consideration for the torus polarity flip for the remaining of the run

[Stepan Stepanyan]

Dear all,

For J/psi and also for the high mass (Q’2>5 GeV) TCS, the acceptance for the 3-particle final states (-++) in FD for outbending case is ~x2 smaller compared to the inbending setting (see below). So, I propose to continue with intending for remaining 6 days (18 shifts).

Will be good to see similar motivations for inbending vs. outbending configurations for other approved RG-A experiments.

We need to see also accumulated charge for these two settings to date for RG-A production runs (>10 GeV).

Also, assuming we will need to do low luminosity, random trigger, and empty target runs with the new setting, real production run time with outbending polarity will be bit more than 5 days. Is there a real benefit to have one more setting (energy/polarity) with small amount of data?

Regards, Stepan


Begin forwarded message:

> Hi Stepan,
>
> Here is the photon energy dependence of the acceptance with 5 million
> generated events.
>
> -Joseph

[cid:f_jsggekm60]

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