Tomography timeline

• 2013: Sayab Muhammad joins GTK, a structural geologist interested abouttomography

• 2015: Sayab, et al., High-resolution X-raycomputed microtomography: A holisticapproach to metamorphic fabric analyses. Geology 43 (1): 55-58 (2015)

• 2015: Funding for a XCT device grantedby Academy of Finland

@ GTK

2013

2015

6/20177/2017 9/2017 3/2018 5/2018

Tomography timeline @ GTK

2013

2015

• 6/2017: Device installation

• 7/2017: First significant sample: Lieksa iron meteorite

• 9/2017: FinTomo network founded

• 9/2017: Launch meet

• 3/2018: Deben stage finally working

• 5/2018: First FinTomo seminar

6/20177/2017 9/2017 3/2018 5/2018

GE phoenix v|tome|x s 240

• Manufactured in Wunstorf, Germany

• 240 kV / 320 W microfocustube

• Most powerful in Finland!

• Resolution up to 5 μm

• Allows imaging of complete drill coresamples

• 180 kV / 15 W nanofocus tube

• Resolution up to 900 nm

• 400×400 mm2 4 Mpix detector

• Max. sample size 26×41 cm2 / 10 kg

• FOV width = 2000 pix

Deben sample stage

• Compression and tension

• Force up to 5 kN

• Displacement up to 10 mm

• Cooling and heating

• Peltier elements at bothends of the sample

• Elements controlledindependently

• -20 to ”160” °C

• Currently up to 100 °C

FEI PerGeos

• Powerful tool for image processing

• Noise filtering

• Segmentation

• Watershed reducesoperator-dependency

• Recipes increaseefficiency

• Analysis

• Grain orientation

• Pore size distribution

• Visualization

How do we fit in?

• Geographically

• Not the first device in thecapital area, but plenty of users here as well

How do we fit in?

• Geographically

• Not the first device in thecapital area, but plenty of users here as well

• Power-wise

• A niche of our own

SkyScans Xradia Micro Xradia Nano GTK / GE

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How do we fit in?

• Geographically

• Not the first device in thecapital area, but plenty of users here as well

• Power-wise

• A niche of our own

• Sample size-wise

• A niche of our own

• We can do something the otherscannot, so no need to compete

• All the more reason to collaborate

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SkyScans Xradia Micro Xradia nano GTK / GE

Current status of the lab

• 9 months of operational use

• ~ 180 working days

• 480 hours of scan time

• 364 h on MF tube +116 h on NF tube

• 177 unique samples

• 21 on NF tube, 156 on MF tube

• Users from 16 different institutions

• Espoo, Helsinki, Kuopio, Oulu, Tampere

• EST, FIN, GER, UK, USA

Past project: Lieksa iron meteorite• First iron meteorite found in Finland

• Max. thickness 6,6 cm, mostly Fe-Ni compound

• 220 kV / 48 W: Inner structure along with volumetric fractions of ironand silicate phases – unattainable by any other method

• 3D image was used to print a 3D copy for the finder

Past and future project: Mineral exploration

workflow

Possible future project: Bentonite in high

temperature

• Structural studies of bentonite have been mostly donein room temperature

• Temperature in nuclear waste repository is significantlyhigher

• Need for structural studies that include hightemperature

• Collaborative EU-project with JYU

• First collaborative FinTomo – project!

• Equipment and operator work from GTK

• Bentonite imaging expertise and sample holdersfrom JYU

FinTomo current status

• Mailing list has 65 (25 present today) recipients from 20 (13) institutions, including every academic XCT device

• ABB, Aalto, Ajat, EP-TeQ, FMI, GTK, HY, JYU, Kavokerr, Nokia, OY, Planmeca, Stora Enso, TTU, TUT, TYKS, UCSF, UEF, UTU, VTT (+ MIKES)

• ”FinTomo board” currently has 11 members from 7 institutions

• One project proposal underway, ideas exist for more

• Website is up but requires work, waiting for domain to open

• A new logo would be nice…

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Thank you!