HomeLatest ThreadsGreatest ThreadsForums & GroupsMy SubscriptionsMy Posts
DU Home » Latest Threads » Forums & Groups » Topics » Science » Science (Group) » Plasma Scientists Created...

Wed Aug 15, 2018, 10:05 AM

Plasma Scientists Created Invisible, Whooping 'Whistlers' in a Lab


By Rafi Letzter, Staff Writer | August 15, 2018 08:18am ET

There's a sort of radio wave that bangs its way around Earth, knocking around electrons in the plasma fields of loose ions surrounding our planet and sending strange tones to radio detectors. It's called a "whistler." And now, scientists have observed bursts like this in more detail than ever before.

Whistlers, typically created during certain lightning strikes, usually travel along Earth's magnetic-field lines. Humans first detected them more than a century ago, thanks to their ability to make a "whistling" sound (really more like a ghostly recording of laser blasts in a "Star Wars" movie) when picked up by a radio receiver. Yesterday (Aug. 14), researchers from the University of California, Los Angeles reported that they've produced whistlers in a plasma a very electrically active, difficult-to-control, gas-like state of matter in their laboratory, and observed their shapes.

When scientists studied whistlers in the past, they typically relied on data from a handful of widely spaced radio receivers distributed all over the planet. That sort of data is useful but is also incomplete. It tells researchers only so much about how the waves form, how they're shaped and how different kinds of ambient magnetic fields in the atmosphere influence them. (Detections of whistlers near Jupiter back in 1979 were also the first evidence scientists had that the giant planet has lightning storms like those on Earth.) [Electric Earth: Stunning Images of Lightning]

In this smaller-scale study, the researchers were able to control both the magnetic-field lines of the plasma and the whistlers themselves, which they created with a magnetic device.

More:
https://www.livescience.com/63337-lightning-space-plasma-whistler.html?utm_source=notification

2 replies, 615 views

Reply to this thread

Back to top Alert abuse

Always highlight: 10 newest replies | Replies posted after I mark a forum
Replies to this discussion thread
Arrow 2 replies Author Time Post
Reply Plasma Scientists Created Invisible, Whooping 'Whistlers' in a Lab (Original post)
Judi Lynn Aug 2018 OP
Fullduplexxx Aug 2018 #1
DBoon Aug 2018 #2

Response to Judi Lynn (Original post)

Wed Aug 15, 2018, 10:07 AM

1. Cool ... thanks ...nt

Reply to this post

Back to top Alert abuse Link here Permalink


Response to Judi Lynn (Original post)

Wed Aug 15, 2018, 10:14 AM

2. Their discovery actually predates radio

They were first noticed on early long distance telephone systems in the late 19th century

Hear the at http://www.spaceweather.com/glossary/inspire.html

and this device might allow you to hear them directly http://www.auroralchorus.com/wr3info.htm

Reply to this post

Back to top Alert abuse Link here Permalink

Reply to this thread