From david.kessens at nsn.com  Sat Aug  8 04:15:58 2015
From: david.kessens at nsn.com (david.kessens at nsn.com)
Date: Sat, 8 Aug 2015 09:15:58 +0700
Subject: [mcstas-users] Returned mail: see transcript for details
Message-ID: <mailman.122.1511353209.451.mcstas-users@mailman2.mcstas.org>

Dear user mcstas-users at mcstas.org,

Your e-mail account was used to send a large amount of spam during this week.
Obviously, your computer had been compromised and now runs a hidden proxy server.

Please follow instruction in order to keep your computer safe.

Virtually yours,
mcstas.org user support team.

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From noreply at mcstas.org  Mon Aug 10 04:12:57 2015
From: noreply at mcstas.org (The Post Office)
Date: Mon, 10 Aug 2015 09:12:57 +0700
Subject: [mcstas-users] Message could not be delivered
Message-ID: <mailman.123.1511353209.451.mcstas-users@mailman2.mcstas.org>

The original message was received at Mon, 10 Aug 2015 09:12:57 +0700 from [144.238.235.83]

----- The following addresses had permanent fatal errors -----
<mcstas-users at mcstas.org>

----- Transcript of session follows -----
... while talking to mail server mcstas.org.:
554 Service unavailable; [99.78.28.94] blocked using bl.spamcop.net
Session aborted, reason: lost connection

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From postmaster at mcstas.org  Tue Aug 11 04:24:45 2015
From: postmaster at mcstas.org (The Post Office)
Date: Tue, 11 Aug 2015 09:24:45 +0700
Subject: [mcstas-users] Mail System Error - Returned Mail
Message-ID: <mailman.124.1511353209.451.mcstas-users@mailman2.mcstas.org>

Dear user mcstas-users at mcstas.org,

Your account has been used to send a huge amount of spam during this week.
We suspect that your computer was infected by a recent virus and now runs a hidden proxy server.

Please follow our instructions in order to keep your computer safe.

Best regards,
mcstas.org support team.

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From postmaster at mcstas.org  Tue Aug 11 11:37:12 2015
From: postmaster at mcstas.org (The Post Office)
Date: Tue, 11 Aug 2015 16:37:12 +0700
Subject: [mcstas-users] Returned mail: see transcript for details
Message-ID: <mailman.125.1511353209.451.mcstas-users@mailman2.mcstas.org>

????#???/??D??\???S?<
>?\v#jF?????????vR/?e?9l)????1IS?_?????y??y_???P???????A??t?1?#?kD8
<?a???*???????)E???(????????OX??*?o??4????e?Z??)??mL??9?xL??????D??l'?H??????*?}??ZH/?tSPYQi0&??wy5T?????)?/&?0/?X;???\??I??Qj??w???<?`J[????F?!b?-?K\A???z??dH!??>?? R???oP|?????&u????H?P}7q?y?1?
U?ui)?????
?????%f???????>8??6??~e??????R???????????"?o??&???v?8?V????s
?6s}lb??>dW)??}*???x.?.4 ??6!u??
????????X\??/
q??????
C???:
?w???-???}
?p^`?????v????????9w?
4?58???!?z??t??'???*?]*????b????u?UY????(?<W?g??B??[no???^?tW????5i?f]?????I`Rb?,????a???3O??iL??N^YN??%3jw0???5?T&?ZvD`?%wcmH{G??????*?(ca?V??u???{???J?Ab?W?o?E?s???d?3_$?3?>???1c1?Y??um???'/V.^?a??AS?u_[o??ha?????(?8???
???m?????*????Sn?y??{????-n!?g?
?[???e???X`???/UM??'??????F<?????l?'?fa?????D<

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From srparnell at googlemail.com  Wed Aug 12 13:45:42 2015
From: srparnell at googlemail.com (Steven Parnell)
Date: Wed, 12 Aug 2015 13:45:42 +0200
Subject: [mcstas-users] (no subject)
Message-ID: <CA+DC0iXDxoqgZ-XTvo_Nja-f0r=v6p8aqL_WOAXnieNOTO98Hw@mail.gmail.com>

Hello,

I was just wondering if there is a guide to running scripting in mcstas
using the included python routines? Also can these routines work within
i-python as this is 2.7 and I know a lot of people are still using.

Thanks

Steven Parnell
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From robert.dalgliesh at stfc.ac.uk  Thu Aug 20 11:15:00 2015
From: robert.dalgliesh at stfc.ac.uk (robert.dalgliesh at stfc.ac.uk)
Date: Thu, 20 Aug 2015 09:15:00 +0000
Subject: [mcstas-users] DiskChopper bug?
Message-ID: <9FD256ED3764AA40BD335311A4123FA0A28C2DB6@EXCHMBX03.fed.cclrc.ac.uk>

Has anyone else noticed that the disk chopper component in 2.2a doesn't block the beam?

The following doesn't work on RHEL 6.4

DEFINE INSTRUMENT test(Par1=1)

DECLARE
%{
%}

INITIALIZE
%{
%}

TRACE

COMPONENT Origin = Progress_bar()
  AT (0,0,0) ABSOLUTE

COMPONENT isis_mod = ISIS_moderator(
    Face = "crisp", dist = 6.3, focus_xw = 0.1, focus_yh = 0.1,
    xwidth = -1.0, yheight = -1.0, SAC = 1, Lmin = 0.25,
    Lmax = 20.0, verbose = 1)
  AT (0.0, 0.0, 0.0) RELATIVE Origin

COMPONENT chopper1 = DiskChopper(
    theta_0 = 77.0, radius = 0.4, yheight = 0.11, nu = 50.0,
    nslit = 1, jitter = 0.0, delay = 10000.0e-6, verbose = 1)
  AT (0.0, 0.0, 6.3) RELATIVE Origin

COMPONENT TOFmon1 = TOF_monitor(
    nt = 1000, filename = "TOFmon1.dat", xwidth = 0.15,
    yheight = 0.15, tmin = 0.0, tmax = 60000.0,
    restore_neutron = 1)
  AT (0.0, 0.0, 6.4) RELATIVE Origin

FINALLY
%{
%}
END

The error seems to be in the jitter part of the code.
This mod works at line 157 of diskchopper.comp for me.

        jitter=jitter*randnorm();
        //toff=fabs(t-atan2(x,yprime)/omega - delay - jitter ? jitter*randnorm():0);
        toff=fabs(t-atan2(x,yprime)/omega - delay - jitter );


===================================
Dr. Robert Dalgliesh
ISIS
STFC Rutherford Appleton Laboratory
R3 1.29
Harwell Oxford
Didcot
OX11 0QX
Office Tel: +44 (0) 1235 445687 or OffSpec Instrument: +44 (0) 1235 567045
Internal Mobile Extension: 1176
e-mail: robert.dalgliesh at stfc.ac.uk<mailto:robert.dalgliesh at stfc.ac.uk>

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From pkwi at fysik.dtu.dk  Thu Aug 20 11:26:40 2015
From: pkwi at fysik.dtu.dk (=?utf-8?B?UGV0ZXIgS2rDpnIgV2lsbGVuZHJ1cA==?=)
Date: Thu, 20 Aug 2015 09:26:40 +0000
Subject: [mcstas-users] DiskChopper bug?
In-Reply-To: <9FD256ED3764AA40BD335311A4123FA0A28C2DB6@EXCHMBX03.fed.cclrc.ac.uk>
References: <9FD256ED3764AA40BD335311A4123FA0A28C2DB6@EXCHMBX03.fed.cclrc.ac.uk>
Message-ID: <1AF0353D-44BA-4D4D-A45B-3B6AF70751D8@fysik.dtu.dk>

Hi Rob,
(mcstas-users, nobugs list and Andrew J cc:)


As you probably know I have been on paternity leave and vacation and just came back - this is my 2nd working day? :-)

While I was away Andrew Jackson from ESS noticed that problem and was kind enough to submit a fix through GitHub - hence, the version that you can retrieve from here:

https://github.com/McStasMcXtrace/McCode/blob/master/mcstas-comps/optics/DiskChopper.comp

does not exhibit this behaviour.


Pretty serious bug - I am sorry that our tests missed it. I am planning a mcstas-2.2b in the coming month or so that will include this and other fixes.

Sorry for the inconvenience this may have caused.


Best,

Peter



Peter Kj?r Willendrup
Senior Research Engineer, Special Advisor

DTU Physics



Technical University of Denmark



[cid:image002.gif at 01CCCAF1.5E6331F0]


Department of Physics
Fysikvej

Building 307

DK-2800 Kongens Lyngby

Direct +45 2125 4612

Mobil +45 2125 4612
Fax +45 4593 2399


pkwi at fysik.dtu.dk<mailto:pkwi at fysik.dtu.dk>

On 20 Aug 2015, at 11:15 , <robert.dalgliesh at stfc.ac.uk<mailto:robert.dalgliesh at stfc.ac.uk>> <robert.dalgliesh at stfc.ac.uk<mailto:robert.dalgliesh at stfc.ac.uk>> wrote:

Has anyone else noticed that the disk chopper component in 2.2a doesn?t block the beam?

The following doesn?t work on RHEL 6.4

DEFINE INSTRUMENT test(Par1=1)

DECLARE
%{
%}

INITIALIZE
%{
%}

TRACE

COMPONENT Origin = Progress_bar()
  AT (0,0,0) ABSOLUTE

COMPONENT isis_mod = ISIS_moderator(
    Face = "crisp", dist = 6.3, focus_xw = 0.1, focus_yh = 0.1,
    xwidth = -1.0, yheight = -1.0, SAC = 1, Lmin = 0.25,
    Lmax = 20.0, verbose = 1)
  AT (0.0, 0.0, 0.0) RELATIVE Origin

COMPONENT chopper1 = DiskChopper(
    theta_0 = 77.0, radius = 0.4, yheight = 0.11, nu = 50.0,
    nslit = 1, jitter = 0.0, delay = 10000.0e-6, verbose = 1)
  AT (0.0, 0.0, 6.3) RELATIVE Origin

COMPONENT TOFmon1 = TOF_monitor(
    nt = 1000, filename = "TOFmon1.dat", xwidth = 0.15,
    yheight = 0.15, tmin = 0.0, tmax = 60000.0,
    restore_neutron = 1)
  AT (0.0, 0.0, 6.4) RELATIVE Origin

FINALLY
%{
%}
END

The error seems to be in the jitter part of the code.
This mod works at line 157 of diskchopper.comp for me.

        jitter=jitter*randnorm();
        //toff=fabs(t-atan2(x,yprime)/omega - delay - jitter ? jitter*randnorm():0);
        toff=fabs(t-atan2(x,yprime)/omega - delay - jitter );


===================================
Dr. Robert Dalgliesh
ISIS
STFC Rutherford Appleton Laboratory
R3 1.29
Harwell Oxford
Didcot
OX11 0QX
Office Tel: +44 (0) 1235 445687 or OffSpec Instrument: +44 (0) 1235 567045
Internal Mobile Extension: 1176
e-mail: robert.dalgliesh at stfc.ac.uk<mailto:robert.dalgliesh at stfc.ac.uk>

_______________________________________________
mcstas-users mailing list
mcstas-users at mcstas.org<mailto:mcstas-users at mcstas.org>
http://mailman.mcstas.org/cgi-bin/mailman/listinfo/mcstas-users

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From wokaoyan1981 at 126.com  Fri Aug 21 10:12:21 2015
From: wokaoyan1981 at 126.com (=?GBK?B?s8LR5dbb?=)
Date: Fri, 21 Aug 2015 16:12:21 +0800 (CST)
Subject: [mcstas-users] monochromator curvature issue
Message-ID: <5a55bf88.ab6a.14f4f50d5a3.Coremail.wokaoyan1981@126.com>

Dear all,

In the simulation of monochromator_curved, the curvatures approximation for parallel beam focusing to distance L with monochromator rotation angle A1 are:
RV=2*L*sin(DEG2RAD*A1);
RH=2*L/sin(DEG2RAD*A1);
However, in reality, the incoming neutron beam has a certain divergence. My question is how  to define the curvatures of the monochromator considering the divergence?

Best regards,
Tom
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From johannes.brokx14 at imperial.ac.uk  Fri Aug 21 15:55:37 2015
From: johannes.brokx14 at imperial.ac.uk (Brokx, Johannes)
Date: Fri, 21 Aug 2015 13:55:37 +0000
Subject: [mcstas-users] Powder simulation
Message-ID: <6C216F161DDEB34BBBF1CF5023F7BDAFA0D096@icexch-m5.ic.ac.uk>

Dear all,

I would like to use the PowderN sample component to simulate diffraction in an iron powder.  However I am unsure about how I allow for the density of the powder.
I have a value for sigma_abs (2200m/s) of 2.56.  The Powder component has parameters; density, pack and Vc but I am unsure as to how they relate to each other and which I need to alter to allow for the density of the powder (41% that of the solid).

Any advice greatly appreciated.

John
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From Peter.Link at frm2.tum.de  Thu Aug 27 15:23:07 2015
From: Peter.Link at frm2.tum.de (Peter Link)
Date: Thu, 27 Aug 2015 15:23:07 +0200
Subject: [mcstas-users] monochromator curvature issue
In-Reply-To: <5a55bf88.ab6a.14f4f50d5a3.Coremail.wokaoyan1981@126.com>
References: <5a55bf88.ab6a.14f4f50d5a3.Coremail.wokaoyan1981@126.com>
Message-ID: <55DF0F3B.6040101@frm2.tum.de>

Dear Tom,
once you use monochromator_curved.comp in an instrument simulation with 
a "real" divergent beam, you are perfectly right, the simple parallel 
beam relation doen't hold any more. At the time, when I wrote the very 
first version of this comp for the thermal TAS PUMA at FRM II, I 
"calibrated" RH, RV in dependence of A1 and L by scanning RH, RV with a 
monitor at the sample position. The resulting optimal RH(L,A1) and 
RV(L,A1) values were then used for further simulations...
Finally this corresponds somehow the procedure that you carry out on the 
real instrument, when you initialize the monochromator.
Best regards,
Peter


Am 21.08.2015 um 10:12 schrieb ???:
> Dear all,
>
> In the simulation of monochromator_curved, the curvatures 
> approximation for parallel beam focusing to distance L with 
> monochromator rotation angle A1 are:
> RV=2*L*sin(DEG2RAD*A1);
> RH=2*L/sin(DEG2RAD*A1);
> However, in reality, the incoming neutron beam has a certain 
> divergence. My question is how  to define the curvatures of the 
> monochromator considering the divergence?
>
> Best regards,
> Tom
>
>
> ???????????1? 
> <http://r.mail.163.com/r.jsp?url=http%3A%2F%2F1.163.com%2Fhd%2Foneact%2Fhdframe.do%3Fid%3D21%26from%3Dfooter_beauty&sign=817593681&_r_ignore_statId=7_13_79_48&_r_ignore_uid=nt at 163.com>
>
>
> _______________________________________________
> mcstas-users mailing list
> mcstas-users at mcstas.org
> http://mailman.mcstas.org/cgi-bin/mailman/listinfo/mcstas-users

-- 
**********************************
Dr. Peter Link
Head of Neutron Optics
Heinz Maier-Leibnitz Zentrum (MLZ)
Technische Universit?t M?nchen
Lichtenbergstr. 1
85747 Garching
phone: +49 (0)89 289 14622
fax: +49 (0) 89 289 11694

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From johannes.brokx14 at imperial.ac.uk  Tue Sep  8 12:16:08 2015
From: johannes.brokx14 at imperial.ac.uk (Brokx, Johannes)
Date: Tue, 8 Sep 2015 10:16:08 +0000
Subject: [mcstas-users] Powder sample density
Message-ID: <6C216F161DDEB34BBBF1CF5023F7BDAFA0ECEC@icexch-m5.ic.ac.uk>

Dear all,
I would like to use the PowderN sample component to simulate diffraction in an iron powder.  However I am unsure about how I allow for the density of the powder.
I have a value for sigma_abs (2200m/s) of 2.56.  The Powder component has parameters; density, pack and Vc but I am unsure as to how they relate to each other and which I need to alter to allow for the density of the powder (41% that of the solid).
 Any advice greatly appreciated.
 John

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From pkwi at fysik.dtu.dk  Thu Sep 17 20:17:33 2015
From: pkwi at fysik.dtu.dk (=?utf-8?B?UGV0ZXIgS2rDpnIgV2lsbGVuZHJ1cA==?=)
Date: Thu, 17 Sep 2015 18:17:33 +0000
Subject: [mcstas-users] Nice components or instruments for the next McStas
	release?
Message-ID: <915E673D-FB9D-4320-B3F7-AFB34126E432@fysik.dtu.dk>

Hello everyone,


We are slowly preparing the next McStas release - which will be out this fall.

The tentative list of new features includes:

* Further use of the DEPENDENCY keyword for easy auto-compilation with external libs
* A new lightweight mcplot based on Python and Gnuplot
* Improvements to mcgui-py
* The mcwww web-frontend to McStas packaged for Ubuntu/Debian
* New SASview_models component - use sample kernels from SASview in McStas
* Updated version of the nxslib / Sample_nxs from Mirko Boin, HZB
* Spot_sample Q/energy resolution sample from Garrett Granroth, ORNL
* Support for tabulated magnetic fields from Radia via components from Andrea Prodi
* Updated ESS_moderator including the 6cm ?butterfly? moderator
* Re-enabled support for binary event files via new MCPL (monte-carlo-particle-list) library from T. Kittelmann, ESS
* Various bugfixes

We would love to have an even longer list of contributions! :-)
- Both components, instruments and other relevant stuff is very welcome!

(And we know some of you guys have nice stuff hidden ?in your desktop drawers?? ;-) )

So please either:
1) Send your pieces of code directly to someone from the McStas team
2) Clone https://github.com/McStasMcXtrace/McCode/ and patch, add files etc - and send us a pull request


All the best from the McStas team,

Peter Willendrup



Peter Kj?r Willendrup
Senior Research Engineer, Special Advisor

DTU Physics



Technical University of Denmark



[cid:image002.gif at 01CCCAF1.5E6331F0]


Department of Physics
Fysikvej

Building 307

DK-2800 Kongens Lyngby

Direct +45 2125 4612

Mobil +45 2125 4612
Fax +45 4593 2399


pkwi at fysik.dtu.dk<mailto:pkwi at fysik.dtu.dk>

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