[Ifeffit] Re: [Ext]Question about Air sensitive sample holder

2025-06-05 Thread Lyle Gordon via Ifeffit 
Uline claims to sell 2.5mil aluminized mylar pouches
https://urldefense.us/v3/__https://www.uline.com/BL_5552/Metalized-Food-Bags__;!!G_uCfscf7eWS!bCh9Az6EOhDyVgNITnhTIcJaKJKI-u6_IyY9vqvYM_0oFm6HwKdjcxZTJkvYmliE-BdcUWFHHO2Vm4QsWKuQQvjh3hJT$
 

I've previously ordered foil pouches from Impak
https://urldefense.us/v3/__https://www.impakcorporation.com/flexible_packaging/mylar-bag/minipouches?limit=100__;!!G_uCfscf7eWS!bCh9Az6EOhDyVgNITnhTIcJaKJKI-u6_IyY9vqvYM_0oFm6HwKdjcxZTJkvYmliE-BdcUWFHHO2Vm4QsWKuQQqhanO8t$
 
but they seem to mostly carry 4.0mil with the Al foil.

There is just metallized mylar and kapton foil available thinner but you
would need to make your own pouches or tape these as a window over a cutout
on a thicker Al foil/mylar pouch.

-Lyle

On Wed, Jun 4, 2025 at 3:14 PM Helen Chen via Ifeffit <
[email protected]> wrote:

> Hello again, I have a follow up question about handling air sensitive
> sample. Some of you mentioned vacuum sealing like which used for food, this
> reminds me a aluminized mylar bags. Does anyone know a good source to get
> thine aluminized mylar
> ZjQcmQRYFpfptBannerStart
> This Message Is From an External Sender
> This message came from outside your organization.
>
> ZjQcmQRYFpfptBannerEnd
> Hello again,
> I have a follow up question about handling air sensitive sample. Some of
> you mentioned vacuum sealing like which used for food, this reminds me a
> aluminized mylar bags. Does anyone know a good source to get thine
> aluminized mylar bags. It seems that the standard thickness is about 0.1mm,
> just wondering if there is a well known source who makes bags thinner than
> that.
> Thank you!
>
> Best,
> Helen
>
> Mike Massey  於 2025年3月22日 週六 下午12:42寫道：
>
>> You can also use a cryostat with only vacuum and no cooling, if desired.
>> Good luck! Mike On Mar 23, 2025, at 08: 16, Carlo Segre via Ifeffit
>>  wrote:  Hi Helen, We have had
>> luck using a vacuum sealing
>> ZjQcmQRYFpfptBannerStart
>> This Message Is From an Untrusted Sender
>> You have not previously corresponded with this sender.
>> See 
>> https://urldefense.us/v3/__https://itconnect.uw.edu/email-tags__;!!G_uCfscf7eWS!bCh9Az6EOhDyVgNITnhTIcJaKJKI-u6_IyY9vqvYM_0oFm6HwKdjcxZTJkvYmliE-BdcUWFHHO2Vm4QsWKuQQrnNRch6$
>>  
>> 
>> for additional information. Please contact the UW-IT Service Center,
>> [email protected] 206.221.5000, for assistance.
>>
>> ZjQcmQRYFpfptBannerEnd
>> You can also use a cryostat with only vacuum and no cooling, if desired.
>>
>>
>> Good luck!
>>
>>
>> Mike
>>
>>
>>
>>
>>
>> On Mar 23, 2025, at 08:16, Carlo Segre via Ifeffit <
>> [email protected]> wrote:
>>
>> 
>> Hi Helen, We have had luck using a vacuum sealing system such as used for
>> food. However the Polyethylene is subject to degradation under the beam so
>> that wrapping with Kapton is helpful as well as double bagging it. Finally,
>> if you keep it under
>> ZjQcmQRYFpfptBannerStart
>> This Message Is From an External Sender
>> This message came from outside your organization.
>>
>> ZjQcmQRYFpfptBannerEnd
>> Hi Helen,
>>
>> We have had luck using a vacuum sealing system such as used for food.
>> However the Polyethylene is subject to degradation under the beam so that
>> wrapping with Kapton is helpful as well as double bagging it.  Finally, if
>> you keep it under Argon when transporting it to the beamline and then in a
>> helium filled chamber, you should avoid the oxidation.
>>
>> Carlo
>>
>>
>> --
>> Carlo Segre, Duchossois Professor of Physics
>> Illinois Institute of Technology
>> --
>> *From:* Helen Chen via Ifeffit 
>> *Sent:* Tuesday, March 18, 2025 8:05 PM
>> *To:* [email protected] <
>> [email protected]>
>> *Cc:* Helen Chen 
>> *Subject:* [Ext][Ifeffit] Question about Air sensitive sample holder
>>
>> Hello, Our group (Jerry Seidler) just started a project involving doing
>> VTC and HERFD on Yb doped CrX3 material. They are thin small crystal sheets
>> and are very air sensitive. We have tried encapsulated them between a layer
>> of laptop tape and
>> ZjQcmQRYFpfptBannerStart
>> This Message Is From an External Sender
>> This message came from outside your organization.
>>
>> ZjQcmQRYFpfptBannerEnd
>> Hello,
>> Our group (Jerry Seidler) just started a project involving doing VTC and
>> HERFD on Yb doped CrX3 material. They are thin small crystal sheets and are
>> very air sensitive. We have tried encapsulated them between a layer of
>> laptop tape and film, but after 12hr we see degradation due to air leaks. I
>> am looking for some advice on air sensitive sample holder. What are some
>> typical methods you use to deal with air sensitivity, especially for
>> samples in thin sheets geometry?
>> Thank you
>>
>> ifeffit mailing list:
>> https://millenia.cars.aps.

[Ifeffit] Re: [Ext]Question about Air sensitive sample holder

2025-06-04 Thread Helen Chen via Ifeffit 
Hello again,
I have a follow up question about handling air sensitive sample. Some of
you mentioned vacuum sealing like which used for food, this reminds me a
aluminized mylar bags. Does anyone know a good source to get thine
aluminized mylar bags. It seems that the standard thickness is about 0.1mm,
just wondering if there is a well known source who makes bags thinner than
that.
Thank you!

Best,
Helen

Mike Massey  於 2025年3月22日 週六 下午12:42寫道：

> You can also use a cryostat with only vacuum and no cooling, if desired.
> Good luck! Mike On Mar 23, 2025, at 08: 16, Carlo Segre via Ifeffit
>  wrote:  Hi Helen, We have had
> luck using a vacuum sealing
> ZjQcmQRYFpfptBannerStart
> This Message Is From an Untrusted Sender
> You have not previously corresponded with this sender.
> See 
> https://urldefense.us/v3/__https://itconnect.uw.edu/email-tags__;!!G_uCfscf7eWS!YttiJF9CGA5azME2Vt5Iz8AbrbERXQqw7mzhwX7xByN3ba7IHye9-MMAHn5ysqlXt4LwKwjZ5H4WVH0BrwTx8eWwIz4kxQ$
>   for additional information.
> Please contact the UW-IT Service Center, [email protected] 206.221.5000, for
> assistance.
>
> ZjQcmQRYFpfptBannerEnd
> You can also use a cryostat with only vacuum and no cooling, if desired.
>
>
> Good luck!
>
>
> Mike
>
>
>
>
>
> On Mar 23, 2025, at 08:16, Carlo Segre via Ifeffit <
> [email protected]> wrote:
>
> 
> Hi Helen, We have had luck using a vacuum sealing system such as used for
> food. However the Polyethylene is subject to degradation under the beam so
> that wrapping with Kapton is helpful as well as double bagging it. Finally,
> if you keep it under
> ZjQcmQRYFpfptBannerStart
> This Message Is From an External Sender
> This message came from outside your organization.
>
> ZjQcmQRYFpfptBannerEnd
> Hi Helen,
>
> We have had luck using a vacuum sealing system such as used for food.
> However the Polyethylene is subject to degradation under the beam so that
> wrapping with Kapton is helpful as well as double bagging it.  Finally, if
> you keep it under Argon when transporting it to the beamline and then in a
> helium filled chamber, you should avoid the oxidation.
>
> Carlo
>
>
> --
> Carlo Segre, Duchossois Professor of Physics
> Illinois Institute of Technology
> --
> *From:* Helen Chen via Ifeffit 
> *Sent:* Tuesday, March 18, 2025 8:05 PM
> *To:* [email protected]  >
> *Cc:* Helen Chen 
> *Subject:* [Ext][Ifeffit] Question about Air sensitive sample holder
>
> Hello, Our group (Jerry Seidler) just started a project involving doing
> VTC and HERFD on Yb doped CrX3 material. They are thin small crystal sheets
> and are very air sensitive. We have tried encapsulated them between a layer
> of laptop tape and
> ZjQcmQRYFpfptBannerStart
> This Message Is From an External Sender
> This message came from outside your organization.
>
> ZjQcmQRYFpfptBannerEnd
> Hello,
> Our group (Jerry Seidler) just started a project involving doing VTC and
> HERFD on Yb doped CrX3 material. They are thin small crystal sheets and are
> very air sensitive. We have tried encapsulated them between a layer of
> laptop tape and film, but after 12hr we see degradation due to air leaks. I
> am looking for some advice on air sensitive sample holder. What are some
> typical methods you use to deal with air sensitivity, especially for
> samples in thin sheets geometry?
> Thank you
>
> ifeffit mailing list:
> https://millenia.cars.aps.anl.gov/mailman3/lists/ifeffit.millenia.cars.aps.anl.gov/
>  
>   >
> to unsubscribe, send mail to [email protected]
>
>
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[Ifeffit] Re: [Ext]Question about Air sensitive sample holder

2025-03-28 Thread Richard Gnewkow via Ifeffit 

Hi,

We often use transmission gas cells with continuous gas flow for measurements 
in the soft X-ray range, and we are wondering if these cells are also a good 
option for measuring air/moisture-sensitive samples in the hard X-ray range.

Two ~150 nm SiN windows isolate the sample and the gas from the environment, and 
we have never had problems with X-ray-induced window damage or leaks. Even with 
continuous helium flow, the pressure in the chamber was <1E-6 mbar.

A single window is sufficient for emission experiments and the design can be 
adapted to allow for large take-off angles.

Does somebody already have experience using cells with SiN/SiC membranes in the 
hard X-ray range and know what the challenges or limitations are?

Best
Richard

On 24/03/2025 20:35, Matt Newville via Ifeffit wrote:

Hi Helen,



+1 on using Aluminized Mylar and Aluminized Kapton (and we have some of
each at sector 13 if you want to borrow some).



The aluminum layer on Mylar is very thin (you can see visible light
through) but it holds helium.  In an undulator beam, Mylar might last 10
seconds. The thin aluminum layer helps a lot, but I would not guarantee
this by itself for multiple hours.



Kapton is leaky but holds up better in an undulator beam (but you can burn
a micro-hole in it over several hours with 10^13 photons/sec in a few
square microns: loving APS-U!)  The Aluminized version is a non-trivial
thickness (several microns) of aluminum, so not suitable for tender beams,
but should be OK above 5 keV (wait, which "V" in VTC -- Yb K or L3 edge?).




I'll say that we have had decent luck (with old APS undulator) with samples
in an otherwise regular Ziplock bag with a Kapton film window (held on with
carefully cut packing tape) for X-rays in and out and over-pressuring the
bag with blow-off N2 (which is free) or helium (which is not). But,
oxygen-sensitivity can vary a lot, so I’m not sure there is a single “best”
solution.



--Matt


On Sat, Mar 22, 2025 at 3:06 PM matthew marcus via Ifeffit <
[email protected]> 
wrote:



Aluminized mylar has a much lower permeability to oxygen than polyethylene
and still works with a heat-sealer. I'm assuming you're in the hard- or
tender X-ray range. mam On 3/22/2025 12: 16 PM, Carlo Segre via Ifeffit
wrote: > Hi Helen, We
ZjQcmQRYFpfptBannerStart
This Message Is From an External Sender
This message came from outside your organization.

ZjQcmQRYFpfptBannerEnd

Aluminized mylar has a much lower permeability to oxygen than
polyethylene and still works with a heat-sealer.  I'm assuming you're in
the hard- or tender X-ray range.
   mam

On 3/22/2025 12:16 PM, Carlo Segre via Ifeffit wrote:


Hi Helen, We have had luck using a vacuum sealing system such as used
for food. However the Polyethylene is subject to degradation under the
beam so that wrapping with Kapton is helpful as well as double bagging
it. Finally, if you keep it under
ZjQcmQRYFpfptBannerStart
This Message Is From an External Sender
This message came from outside your organization.
ZjQcmQRYFpfptBannerEnd
Hi Helen,

We have had luck using a vacuum sealing system such as used for food.
However the Polyethylene is subject to degradation under the beam so
that wrapping with Kapton is helpful as well as double bagging it.
Finally, if you keep it under Argon when transporting it to the beamline
and then in a helium filled chamber, you should avoid the oxidation.

Carlo


--
Carlo Segre, Duchossois Professor of Physics
Illinois Institute of Technology

*From:* Helen Chen via Ifeffit 

*Sent:* Tuesday, March 18, 2025 8:05 PM
*To:* [email protected] 

*Cc:* Helen Chen 
*Subject:* [Ext][Ifeffit] Question about Air sensitive sample holder
Hello, Our group (Jerry Seidler) just started a project involving doing
VTC and HERFD on Yb doped CrX3 material. They are thin small crystal
sheets and are very air sensitive. We have tried encapsulated them
between a layer of laptop tape and
ZjQcmQRYFpfptBannerStart
This Message Is From an External Sender
This message came from outside your organization.
ZjQcmQRYFpfptBannerEnd
Hello,
Our group (Jerry Seidler) just started a project involving doing VTC and
HERFD on Yb doped CrX3 material. They are thin small crystal sheets and
are very air sensitive. We have tried encapsulated them between a layer
of laptop tape and film, but after 12hr we see degradation due to air
leaks. I am looking for some advice on air sensitive sample holder. What
are some typical methods you use to deal with air sensitivity,
especially for samples in thin sheets geometry?
Thank you


ifeffit mailing list:  
https://millenia.cars.aps.anl.gov/mailman3/lists/ifeffit.millenia.cars.aps.anl.gov/
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ifeff

[Ifeffit] Re: [Ext]Question about Air sensitive sample holder

2025-03-24 Thread Matt Newville via Ifeffit 
Hi Helen,



 +1 on using Aluminized Mylar and Aluminized Kapton (and we have some of
each at sector 13 if you want to borrow some).



The aluminum layer on Mylar is very thin (you can see visible light
through) but it holds helium.  In an undulator beam, Mylar might last 10
seconds. The thin aluminum layer helps a lot, but I would not guarantee
this by itself for multiple hours.



Kapton is leaky but holds up better in an undulator beam (but you can burn
a micro-hole in it over several hours with 10^13 photons/sec in a few
square microns: loving APS-U!)  The Aluminized version is a non-trivial
thickness (several microns) of aluminum, so not suitable for tender beams,
but should be OK above 5 keV (wait, which "V" in VTC -- Yb K or L3 edge?).




I'll say that we have had decent luck (with old APS undulator) with samples
in an otherwise regular Ziplock bag with a Kapton film window (held on with
carefully cut packing tape) for X-rays in and out and over-pressuring the
bag with blow-off N2 (which is free) or helium (which is not). But,
oxygen-sensitivity can vary a lot, so I’m not sure there is a single “best”
solution.



--Matt


On Sat, Mar 22, 2025 at 3:06 PM matthew marcus via Ifeffit <
[email protected]> wrote:

> Aluminized mylar has a much lower permeability to oxygen than polyethylene
> and still works with a heat-sealer. I'm assuming you're in the hard- or
> tender X-ray range. mam On 3/22/2025 12: 16 PM, Carlo Segre via Ifeffit
> wrote: > Hi Helen, We
> ZjQcmQRYFpfptBannerStart
> This Message Is From an External Sender
> This message came from outside your organization.
>
> ZjQcmQRYFpfptBannerEnd
>
> Aluminized mylar has a much lower permeability to oxygen than
> polyethylene and still works with a heat-sealer.  I'm assuming you're in
> the hard- or tender X-ray range.
>   mam
>
> On 3/22/2025 12:16 PM, Carlo Segre via Ifeffit wrote:
> > Hi Helen, We have had luck using a vacuum sealing system such as used
> > for food. However the Polyethylene is subject to degradation under the
> > beam so that wrapping with Kapton is helpful as well as double bagging
> > it. Finally, if you keep it under
> > ZjQcmQRYFpfptBannerStart
> > This Message Is From an External Sender
> > This message came from outside your organization.
> > ZjQcmQRYFpfptBannerEnd
> > Hi Helen,
> >
> > We have had luck using a vacuum sealing system such as used for food.
> > However the Polyethylene is subject to degradation under the beam so
> > that wrapping with Kapton is helpful as well as double bagging it.
> > Finally, if you keep it under Argon when transporting it to the beamline
> > and then in a helium filled chamber, you should avoid the oxidation.
> >
> > Carlo
> >
> >
> > --
> > Carlo Segre, Duchossois Professor of Physics
> > Illinois Institute of Technology
> > 
> > *From:* Helen Chen via Ifeffit 
> > *Sent:* Tuesday, March 18, 2025 8:05 PM
> > *To:* [email protected] 
> > *Cc:* Helen Chen 
> > *Subject:* [Ext][Ifeffit] Question about Air sensitive sample holder
> > Hello, Our group (Jerry Seidler) just started a project involving doing
> > VTC and HERFD on Yb doped CrX3 material. They are thin small crystal
> > sheets and are very air sensitive. We have tried encapsulated them
> > between a layer of laptop tape and
> > ZjQcmQRYFpfptBannerStart
> > This Message Is From an External Sender
> > This message came from outside your organization.
> > ZjQcmQRYFpfptBannerEnd
> > Hello,
> > Our group (Jerry Seidler) just started a project involving doing VTC and
> > HERFD on Yb doped CrX3 material. They are thin small crystal sheets and
> > are very air sensitive. We have tried encapsulated them between a layer
> > of laptop tape and film, but after 12hr we see degradation due to air
> > leaks. I am looking for some advice on air sensitive sample holder. What
> > are some typical methods you use to deal with air sensitivity,
> > especially for samples in thin sheets geometry?
> > Thank you
> >
> >
> > ifeffit mailing list:  
> > https://millenia.cars.aps.anl.gov/mailman3/lists/ifeffit.millenia.cars.aps.anl.gov/
> > to unsubscribe, send mail to [email protected]
>
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> to unsubscribe, send mail to [email protected]
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-- 
--Matt Newville  630-327-7411
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[Ifeffit] Re: [Ext]Question about Air sensitive sample holder

2025-03-22 Thread Mike Massey via Ifeffit 
You can also use a cryostat with only vacuum and no cooling, if desired.


Good luck!


Mike





> On Mar 23, 2025, at 08:16, Carlo Segre via Ifeffit 
>  wrote:
> 
> 
> This Message Is From an External Sender
> This message came from outside your organization.
> Hi Helen,
> 
> We have had luck using a vacuum sealing system such as used for food.  
> However the Polyethylene is subject to degradation under the beam so that 
> wrapping with Kapton is helpful as well as double bagging it.  Finally, if 
> you keep it under Argon when transporting it to the beamline and then in a 
> helium filled chamber, you should avoid the oxidation.
> 
> Carlo
> 
> 
> --
> Carlo Segre, Duchossois Professor of Physics
> Illinois Institute of Technology
> From: Helen Chen via Ifeffit 
> Sent: Tuesday, March 18, 2025 8:05 PM
> To: [email protected] 
> Cc: Helen Chen 
> Subject: [Ext][Ifeffit] Question about Air sensitive sample holder
>  
> This Message Is From an External Sender
> This message came from outside your organization.
> Hello,
> Our group (Jerry Seidler) just started a project involving doing VTC and 
> HERFD on Yb doped CrX3 material. They are thin small crystal sheets and are 
> very air sensitive. We have tried encapsulated them between a layer of laptop 
> tape and film, but after 12hr we see degradation due to air leaks. I am 
> looking for some advice on air sensitive sample holder. What are some typical 
> methods you use to deal with air sensitivity, especially for samples in thin 
> sheets geometry?
> Thank you
> 
> ifeffit mailing list:  
> https://millenia.cars.aps.anl.gov/mailman3/lists/ifeffit.millenia.cars.aps.anl.gov/
> to unsubscribe, send mail to [email protected]
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[Ifeffit] Re: [Ext]Question about Air sensitive sample holder

2025-03-22 Thread matthew marcus via Ifeffit 




Aluminized mylar has a much lower permeability to oxygen than polyethylene and still works with a heat-sealer. I'm assuming you're in the hard- or tender X-ray range. mam On 3/22/2025 12: 16 PM, Carlo Segre via Ifeffit wrote: > Hi Helen, We



ZjQcmQRYFpfptBannerStart




  

  
	This Message Is From an External Sender
  
  
This message came from outside your organization.
  



 
  


ZjQcmQRYFpfptBannerEnd




Aluminized mylar has a much lower permeability to oxygen than 
polyethylene and still works with a heat-sealer.  I'm assuming you're in 
the hard- or tender X-ray range.
	mam

On 3/22/2025 12:16 PM, Carlo Segre via Ifeffit wrote:
> Hi Helen, We have had luck using a vacuum sealing system such as used 
> for food. However the Polyethylene is subject to degradation under the 
> beam so that wrapping with Kapton is helpful as well as double bagging 
> it. Finally, if you keep it under
> ZjQcmQRYFpfptBannerStart
> This Message Is From an External Sender
> This message came from outside your organization.
> ZjQcmQRYFpfptBannerEnd
> Hi Helen,
> 
> We have had luck using a vacuum sealing system such as used for food.  
> However the Polyethylene is subject to degradation under the beam so 
> that wrapping with Kapton is helpful as well as double bagging it.  
> Finally, if you keep it under Argon when transporting it to the beamline 
> and then in a helium filled chamber, you should avoid the oxidation.
> 
> Carlo
> 
> 
> --
> Carlo Segre, Duchossois Professor of Physics
> Illinois Institute of Technology
> 
> *From:* Helen Chen via Ifeffit 
> *Sent:* Tuesday, March 18, 2025 8:05 PM
> *To:* [email protected] 
> *Cc:* Helen Chen 
> *Subject:* [Ext][Ifeffit] Question about Air sensitive sample holder
> Hello, Our group (Jerry Seidler) just started a project involving doing 
> VTC and HERFD on Yb doped CrX3 material. They are thin small crystal 
> sheets and are very air sensitive. We have tried encapsulated them 
> between a layer of laptop tape and
> ZjQcmQRYFpfptBannerStart
> This Message Is From an External Sender
> This message came from outside your organization.
> ZjQcmQRYFpfptBannerEnd
> Hello,
> Our group (Jerry Seidler) just started a project involving doing VTC and 
> HERFD on Yb doped CrX3 material. They are thin small crystal sheets and 
> are very air sensitive. We have tried encapsulated them between a layer 
> of laptop tape and film, but after 12hr we see degradation due to air 
> leaks. I am looking for some advice on air sensitive sample holder. What 
> are some typical methods you use to deal with air sensitivity, 
> especially for samples in thin sheets geometry?
> Thank you
> 
> 
> ifeffit mailing list:  https://millenia.cars.aps.anl.gov/mailman3/lists/ifeffit.millenia.cars.aps.anl.gov/
> to unsubscribe, send mail to [email protected]


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[Ifeffit] Re: [Ext]Question about Air sensitive sample holder

2025-03-22 Thread Carlo Segre via Ifeffit 
Hi Helen,

We have had luck using a vacuum sealing system such as used for food.  However 
the Polyethylene is subject to degradation under the beam so that wrapping with 
Kapton is helpful as well as double bagging it.  Finally, if you keep it under 
Argon when transporting it to the beamline and then in a helium filled chamber, 
you should avoid the oxidation.

Carlo


--
Carlo Segre, Duchossois Professor of Physics
Illinois Institute of Technology

From: Helen Chen via Ifeffit 
Sent: Tuesday, March 18, 2025 8:05 PM
To: [email protected] 
Cc: Helen Chen 
Subject: [Ext][Ifeffit] Question about Air sensitive sample holder

Hello, Our group (Jerry Seidler) just started a project involving doing VTC and 
HERFD on Yb doped CrX3 material. They are thin small crystal sheets and are 
very air sensitive. We have tried encapsulated them between a layer of laptop 
tape and
ZjQcmQRYFpfptBannerStart
This Message Is From an External Sender
This message came from outside your organization.

ZjQcmQRYFpfptBannerEnd
Hello,
Our group (Jerry Seidler) just started a project involving doing VTC and HERFD 
on Yb doped CrX3 material. They are thin small crystal sheets and are very air 
sensitive. We have tried encapsulated them between a layer of laptop tape and 
film, but after 12hr we see degradation due to air leaks. I am looking for some 
advice on air sensitive sample holder. What are some typical methods you use to 
deal with air sensitivity, especially for samples in thin sheets geometry?
Thank you

ifeffit mailing list:  
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[Ifeffit] Re: [Ext]Question about Air sensitive sample holder

2025-03-22 Thread Robert Gordon via Ifeffit 

Hi Helen,

As an alternative, for a highly air-sensitive material, you might 
consider a small can that can be sealed under

inert atmosphere.

APS Sector 20 (now 25ID) had, and may still have, a small Be dome. You 
could use a small aluminium can,
with windows that are less permeable to air/O2/CO2/H20...e.g. Be sheet, 
diamond, maybe even graphite.

(not under vacuum), maybe even thin aluminium.

If you use a slotted holder for the sample, you can use that for 
alignment if you can't see the sample.


For shipping, a mason jar also sealed under inert atmosphere works well.

-R.

On 2025-03-22 12:16 p.m., Carlo Segre via Ifeffit wrote:
Hi Helen, We have had luck using a vacuum sealing system such as used 
for food. However the Polyethylene is subject to degradation under the 
beam so that wrapping with Kapton is helpful as well as double bagging 
it. Finally, if you keep it under

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Hi Helen,

We have had luck using a vacuum sealing system such as used for food.  
However the Polyethylene is subject to degradation under the beam so 
that wrapping with Kapton is helpful as well as double bagging it.  
Finally, if you keep it under Argon when transporting it to the 
beamline and then in a helium filled chamber, you should avoid the 
oxidation.


Carlo


--
Carlo Segre, Duchossois Professor of Physics
Illinois Institute of Technology

*From:* Helen Chen via Ifeffit 
*Sent:* Tuesday, March 18, 2025 8:05 PM
*To:* [email protected] 


*Cc:* Helen Chen 
*Subject:* [Ext][Ifeffit] Question about Air sensitive sample holder
Hello, Our group (Jerry Seidler) just started a project involving 
doing VTC and HERFD on Yb doped CrX3 material. They are thin small 
crystal sheets and are very air sensitive. We have tried encapsulated 
them between a layer of laptop tape and

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Hello,
Our group (Jerry Seidler) just started a project involving doing VTC 
and HERFD on Yb doped CrX3 material. They are thin small crystal 
sheets and are very air sensitive. We have tried encapsulated them 
between a layer of laptop tape and film, but after 12hr we see 
degradation due to air leaks. I am looking for some advice on air 
sensitive sample holder. What are some typical methods you use to deal 
with air sensitivity, especially for samples in thin sheets geometry?

Thank you


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