[Fast-Neutrons] Fiber scintillators for fast neutron imaging

[Alan Hewat]

Thanks Ilan. I was recently in contact with jiri.parizek at crytur.cz at
CRYTUR for thin single crystal x-ray scintillators.

Alan
______________________________________________________
   Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE
                               from my telephone
<Alan.Hewat at NeutronOptics.com> +33.476.98.41.68
        http://www.NeutronOptics.com/hewat
______________________________________________________

On Wed, 18 Dec 2019, 12:23 Ilan Mor, <ilmor at soreq.gov.il> wrote:

> Alan,
>
>
>
> Initially we bought our 20 cm x 20 cm fiber screen (0.5mm fibers, 3cm
> thick) from Saint-Gobain.
>
> Later on, a similar screen was purchased from Crytur. It had less defects
> and much faster delivery time.
>
>
>
> I believe that a larger screen with 250um fibers can be made. One has to
> discuss this with the relevant companies.
>
>
>
> Regards,
>
> Ilan
>
>
>
> *מאת**:* Alan Hewat [mailto:alan.hewat at neutronoptics.com]
> *נשלח:* יום ד 18 דצמבר 2019 11:58
> *אל:* אילן מור
> *עותק:* fast-neutrons at neutronsources.org
> *נושא:* Fibre scintillators for fast neutron imaging
>
>
>
> Ilan, Thank you for bringing your nice paper
> <https://www.sciencedirect.com/science/article/pii/S0168900211005390> to
> our attention. I was particularly interested in two points you made about
> fast neutron scintillators:
>
> 1) With a large aperture lens (f/0.95) the small depth of field gives
> better resolution than might be expected from thick (10mm) slab
> scintillators because you focus on the surface.
>
> 2) Already available 250 micron fibre scintillators can be made quite
> thick because the fibre coating prevents cross-talk between fibres. If only
> such scintillators could be made with areas big enough to cover Michael's
> 200 micron pixel detector. That's already quite good resolution for hot
> neutrons.
>
>
>
> Thanks, Alan
>
>
>
> On Wed, 18 Dec 2019 at 10:05, Ilan Mor <ilmor at soreq.gov.il> wrote:
>
> Hello all,
>
>
>
> We used in the past a steel mask with line pairs which was used to
> quantify the CTF of our system (see description in the attached paper).
>
> Unfortunately this mask was lost.
>
> Our colleague from PTB produced a similar mask made of heavy met.
>
>
>
> Regards,
>
>
>
> Ilan
>
> *מאת**:* fast-neutrons-bounces at neutronsources.org [mailto:
> fast-neutrons-bounces at neutronsources.org] *בשם *Michael Taylor
> *נשלח:* יום ג 17 דצמבר 2019 19:23
> *אל:* Lehmann Eberhard (PSI); Alan Hewat
> *עותק:* fast-neutrons at neutronsources.org
> *נושא:* POSSIBLY SPOOFED: Re: [Fast-Neutrons] characterization of fast
> neutron setups
>
> ______________________________________________
>
> *   Dr Alan Hewat, NeutronOptics, Grenoble, FRANCE *
>
> <Alan.Hewat at NeutronOptics.com> +33.476.98.41.68
> http://www.NeutronOptics.com/hewat TVA FR 79499450856
> ______________________________________________
>
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