Navigation Links
Scientists observe quantum vortices in cold helium droplets
Date:8/21/2014

An international research team including DESY scientists has observed tiny quantum vortices in cold droplets of liquid helium. The team reports in the journal Science that the exotic vortices arrange themselves as densely packed lattices inside the nanodroplets. It is the first time that the quantum vortices, which have already been observed in larger samples of what is known as superfluid helium, have been detected in nanodroplets. "The experiment has exceeded our best expectations," says Andrey Vilesov of the University of Southern California, one of the experiment's three leads.

The noble gas helium becomes liquid at minus 269 degrees Celsius. Below minus 271 degrees a quantum effect occurs, through which the liquid helium loses all internal friction and becomes superfluid. In this exotic state it can even crawl up walls. To explore the dynamics of superfluid helium, the scientists X-rayed tiny helium nanodroplets with what is currently the world's strongest X-ray laser, the Linac Coherent Light Source LCLS at the SLAC National Accelerator Laboratory in California.

The production of the cold droplets with an average of only 0.2 to 2 thousandths of a millimetre was no easy task. The scientists sprayed the liquid helium through a fine nozzle into a vacuum chamber. A portion of the helium evaporated on the way, and the remaining portion of the drop continued cooling due to evaporative cooling. "After a distance of few millimeters, the drops reached the superfluid state and were struck by the intense X-ray laser flash further downstream," explains DESY scientist Daniel Rolles of the Center for Free-Electron Laser Science CFEL, a joint facility run by DESY, the University of Hamburg and the Max-Planck Society.

An especially detailed recording of the X-ray scattering patterns of the nanodroplets was made possible using the CAMP experimental vacuum chamber, developed by a Max Planck Group in Hamburg at CFEL. "CAMP has two large d
'/>"/>

Contact: Thomas Zoufal
presse@desy.de
49-408-998-1666
Deutsches Elektronen-Synchrotron DESY
Source:Eurekalert

Page: 1 2

Related biology technology :

1. Scientists defuse the Vietnam time bomb
2. Singapore scientists lead human embryonic stem cell study
3. Sheffield scientists shine a light on the detection of bacterial infection
4. Nanowiggles: Scientists discover graphene nanomaterials with tunable functionality in electronics
5. Scientists solve mystery of colorful armchair nanotubes
6. iBioSeminars and iBioMagazine: Free, Online Biology Seminars and Short Talks by Leading Scientists
7. Chinese Scientists Zhen-Yi Wang and Zhu Chen Awarded 7th Annual Szent-Gyorgyi Prize for Progress in Cancer Research
8. Scientists decode brain waves to eavesdrop on what we hear
9. Receptos Scientists Publish Determination of a High Resolution Sphingosine 1-Phosphate Receptor 1 Structure in Science
10. Scientists learn how to out run damage with imaging technique
11. Design eye for the science guy: Drop-in clinic helps scientists communicate data
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:9/19/2014)... is rarely simple. From crop yields to disease risks, ... those considered "complex traits." Just as for heightthe textbook ... particular human disease are shaped by multiple genetic and ... involved. To track down such genes, geneticists typically mate ... large mouse and a small mouseand then study their ...
(Date:9/19/2014)... than electricity, to move data would consume much ... growing concern as chips, transistor counts rise. , ... light emitters, modulators, and detectors emitters ... source for optical chips is molybdenum disulfide (MoS2), ... a single, atom-thick layer. Other experimental on-chip light ...
(Date:9/19/2014)... NEW YORK , Sept. 19, 2014  An ... common forms of inherited neuropathies – Charcot-Marie-Tooth disease (CMT) ... feet and legs, causing extreme muscle atrophy, weakness, and ... in the US and millions worldwide. CMT is a ... use of their legs, requiring mobility devices such as ...
(Date:9/19/2014)... SAN FRANCISCO , Sept. 19, 2014 /PRNewswire/ ... announced results from preclinical studies characterizing the analgesic ... oral, peripherally-acting kappa opioid receptor agonist molecules. The ... molecule polymer medicinal chemistry platform. The ... described in the medical literature. 1,2 Kappa ...
Breaking Biology Technology:Want to link genes to complex traits? Start with more diversity 2Toward optical chips 2Toward optical chips 3September is Charcot-Marie-Tooth (CMT) Awareness Month - Scheduled events, activities and important partnerships announced throughout the month! 2Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 2Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 3Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 4Nektar Presents Positive Preclinical Data on Oral, Peripherally-Acting Kappa Agonist Molecules at 2014 American Academy of Pain Management Meeting 5
... and HILDEN, Germany , May 25, ... , Prime Standard:,QIA) today announced that it has entered ... pursuant to which QIAGEN has acquired all rights,to 70 ... -based specialized,laboratory center for food analysis. The transaction further ...
... Carolina Conceptions, an infertility practice in Raleigh, NC , announces IRB ... newer technology that is growing in demand. While embryo and sperm freezing have ... achieve the same level of success. , ... Unlike fertilized eggs (embryos) and sperm, which thaw well, the larger egg ...
... ... Mills is the latest company to become a tenant at the North ... partnership between David Murdock and the University of North Carolina System. ... Other tenants on the Campus include: Dole Food Inc, Monsanto, NC State ...
Cached Biology Technology:QIAGEN Acquires Comprehensive Portfolio of Molecular Food Safety Tests 2QIAGEN Acquires Comprehensive Portfolio of Molecular Food Safety Tests 3QIAGEN Acquires Comprehensive Portfolio of Molecular Food Safety Tests 4QIAGEN Acquires Comprehensive Portfolio of Molecular Food Safety Tests 5QIAGEN Acquires Comprehensive Portfolio of Molecular Food Safety Tests 6QIAGEN Acquires Comprehensive Portfolio of Molecular Food Safety Tests 7Carolina Conceptions Announces New Egg Freezing Study to Help Women Preserve their Fertility 2General Mills Joins Kannapolis Research Campus 2General Mills Joins Kannapolis Research Campus 3
(Date:9/21/2014)... the eve of United Nations General Assembly events focussed ... mothers, newborns and children, Grand Challenges Canada, funded by ... grants for 22 bold ideas to address this challenge. ... A program for Bangladeshi mothers working in garment factories ... improving infant nutrition, reducing absenteeism due to child illnesses, ...
(Date:9/21/2014)... the main contributor to global warming, are set to rise ... billion tonnes. , The 2.5 per cent projected rise in ... which is co-led in the UK by researchers at the ... East Anglia and the College of Engineering, Mathematics and Physical ... of the New York Climate Summit, where world leaders will ...
(Date:9/21/2014)... thought, newborn immune T cells may have the ability ... a new study led by King,s College London. Although ... adults, babies may still be able to mount a ... journal Nature Medicine . , Our immune system ... cells, including neutrophils which play an important role in ...
Breaking Biology News(10 mins):Canada funds 22 innovative projects to help save 'Every Woman, Every Child' 2Canada funds 22 innovative projects to help save 'Every Woman, Every Child' 3Canada funds 22 innovative projects to help save 'Every Woman, Every Child' 4Canada funds 22 innovative projects to help save 'Every Woman, Every Child' 5Canada funds 22 innovative projects to help save 'Every Woman, Every Child' 6Canada funds 22 innovative projects to help save 'Every Woman, Every Child' 7Canada funds 22 innovative projects to help save 'Every Woman, Every Child' 8Canada funds 22 innovative projects to help save 'Every Woman, Every Child' 9Canada funds 22 innovative projects to help save 'Every Woman, Every Child' 10Canada funds 22 innovative projects to help save 'Every Woman, Every Child' 11Canada funds 22 innovative projects to help save 'Every Woman, Every Child' 12Canada funds 22 innovative projects to help save 'Every Woman, Every Child' 13Canada funds 22 innovative projects to help save 'Every Woman, Every Child' 14Canada funds 22 innovative projects to help save 'Every Woman, Every Child' 15CO2 emissions set to reach new 40 billion ton record high in 2014 2CO2 emissions set to reach new 40 billion ton record high in 2014 3Immune system of newborn babies is stronger than previously thought 2
... a New Zealand snail and its worm parasite makes ... reproduction in the absence of parasites, say Indiana University ... this week,s Current Biology . The scientists, ... Hypothesis" of sex, which suggests sexual reproduction allows host ...
... received a $3 million grant from the National Science ... Festival and fund the creation and growth of Science ... first annual San Diego Science Festival, held March-April 2009. ... San Diego as a national and global leader in ...
... Cornell Medical Center have discovered a new gene fusion that ... results may lead to more accurate prostate cancer testing and ... -- a hybrid gene formed from two previously separated genes ... cells to grow more quickly than normal cells. The ...
Cached Biology News:Parasitic worms make sex worthwhile 2Parasitic worms make sex worthwhile 3UC San Diego's $3 million NSF grant to fund science festivals 2UC San Diego's $3 million NSF grant to fund science festivals 3Newly discovered gene fusion may lead to improved prostate cancer diagnosis 2Newly discovered gene fusion may lead to improved prostate cancer diagnosis 3