[Halld-klf] [EXTERNAL] Re: KL beam line check

[Igor Strakovsky]

Dear Beni,

Please include into the list Sasha Somov, Mikhail Bashkanov, and Ilya Larin

Thanks, Igor


On Mon, Dec 11, 2023 at 5:01 PM Igor Strakovsky <igor at gwu.edu> wrote:

> Beni,
>
> I do not know how you did your simulations but the bottom line is they
> disagree with what we have in our proposal.
> The size of the Be-target and W-plug were optimized to allow 3x10^4 KL/sec
> to reach cryo target
>
> Cheers, Igor
>
> On Mon, Dec 11, 2023 at 4:55 PM Beni Zihlmann <zihlmann at jlab.org> wrote:
>
>> Attached you find a short note about simulating Klong beam in the
>> Be-production
>> target and test how many may reach the liquid hydrogen target.
>> As you can see the transmission rate is below 10% for any Klong below
>> 2000MeV/c
>>
>> Also it looks like it is very important to have good shielding along the
>> beam line
>> all the way from the start of the beam line to the exit of the alcove
>> and also
>> before the cryogenic target to prevent particles from entering the CDC
>> gong
>> along z over the full length of the CDC. such particles are devastating
>> for CDC
>> operation.
>>
>> cheers,
>> Beni_______________________________________________
>> Halld-klf mailing list
>> Halld-klf at jlab.org
>> https://mailman.jlab.org/mailman/listinfo/halld-klf
>>
>
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