[Insight-users] Re-introduction

Tue Aug 18 12:52:06 EDT 2009

Hi Alex:

The information will soon be on our web site but of course I can tell you now, if it changes then the web site will be updated so anyone reading this, please check back if you really want to know the exact configuration (www.diamond.ac.uk then look for 'jeep beamline' or 'I12 beamline' .. The website has not been put up yet, maybe 2 weeks?) 

There will be a call for 'commissioning proposals' if anyone is interested -- Contact me off-list for more discussion! There are different terms for (1) UK users (2) EU users (3) everyone else. 

The plan is for 4 types of detector, two of which are primarily for imaging and the other two primarily for diffraction-based methods. Here's the table pasted from the webpage, apologies for lack of formatting but plain text is better for email, I think it's required for this list anyways.

The frame rates mentioned are the limits of the detectors. For a real experiment there may be other limits -- our rotation stage has a maximum of 10 Hz , so theoretically we could do 10 tomography images per second using ~600 projections per image with the high-speed camera. The sample itself may limit this further ... Can we get a good projection image in that time? For some types of sample it should be possible .. But the most interesting samples to image at 10 three-d frames per second might be exactly those samples that cannot be spun around that quickly without altering the process! So, many challenges remain...

Imaging detectors:
1. High resolution monochromatic X-ray imaging
   Detector: PCO 4000 camera:
Technology: CCD 
4008 x 2672 pixel 
Pixel size 9 m x 9 m 
Frame rate up to 5 fps 
used with camera modules for monochromatic beam 

2. High speed white beam imaging 
    Detector Vision Research Phantom v7.3 camera:
Technology: CMOS 
800 x 600 pixel 
Pixel size 22 m x 22 m 
Frame rate up to 6600 fps 
Max. recording time 2.6 s (at a frame rate of 6600 fps) 
used with camera modules for monochromatic beam and white beam 

Both the high resolution monochromatic X-ray camera as well as the high speed white beam camera require imaging camera optical modules. These are being designed and built in-house

Monochromatic module: Four objective lenses (configured in folded path so the lenses and camera don't go in the X-ray beam!) The fields-of-view range from 3mm to 50mm Each objective has its own scintillator, the thickness of the scintillator matched to the depth-of-field of the lens for maximum light output without spreading the image. This required different materials to be used for each and it has not been easy to get it all sorted out. The module is completely enclosed and lightproofed (a carbon window allows the x-rays to reach the scintillator while blocking visible light) 

White beam module: we are still working on this. The Monochromatic module's scintillators would probably vaporize instantly when exposed to the "white" beam :-0 

Diffraction Detectors:

3. Multi-element Germanium Energy Dispersive X-ray Diffraction detector
    Canberra EDXD detector:
    23 X-ray sensitive elements arranged in a 180° arc 

4. Large area 2D detector 
   Thales Pixium RF4343 flat panel detector:
Technology: CsI scintillator on an amorphous Si substrate 
2880x 2881 pixel 
Pixel size 148 m x 148 m 

Hope this is of interest
Robert

-----Original Message-----
From: Oleksandr Dzyubak [mailto:adzyubak at gmail.com] 
Sent: 18 August 2009 16:55
To: Atwood, Robert (DLSLtd,RAL,DIA)
Cc: insight-users at itk.org
Subject: Re: [Insight-users] Re-introduction

Hi Robert,

What's your detector array and frame rate?

Alex

Atwood, Robert (DLSLtd,RAL,DIA) wrote:
> Hi, ITK users:
>  
> I am back on this list and at my new employment, if anyone has my old 
> Imperial College (imperial dot ac dot uk) address --- it will not work 
> any more.
>  
> I am now at Diamond Synchrotron, at the joint Environmental, 
> Engineering and Processing 'JEEP' beamline, and will be dealing with 
> hard X-ray tomographic imaging for a variety of purposes (which will 
> depend upon proposals received)  but with an emphasis on materials 
> science and processing. High-speed tomographic time-series is one 
> method that we are in the process of developing -- with associated 
> challenge of processing the data as fast as we acquire it!
>  
> Since this organization's data analysis department has decided to 
> standardize everything on a Python-based system as much as possible, I 
> guess I will be trying to learn to use WrapITK in the very near future.
>  
> Regards,
>  
> Robert Atwood
>  
>  
>
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This e-mail and any attachments may contain confidential, copyright and or privileged material, and are for the use of the intended addressee only. If you are not the intended addressee or an authorised recipient of the addressee please notify us of receipt by returning the e-mail and do not use, copy, retain, distribute or disclose the information in or attached to the e-mail.
Any opinions expressed within this e-mail are those of the individual and not necessarily of Diamond Light Source Ltd. 
Diamond Light Source Ltd. cannot guarantee that this e-mail or any attachments are free from viruses and we cannot accept liability for any damage which you may sustain as a result of software viruses which may be transmitted in or with the message.
Diamond Light Source Limited (company no. 4375679). Registered in England and Wales with its registered office at Diamond House, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0DE, United Kingdom