Author Topic: Gravity-wave detector - Radio Electronics April 1986  (Read 3521 times)

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Offline floobydust

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Gravity-wave detector - Radio Electronics April 1986
« on: January 01, 2017, 01:13:32 am »
Anyone remember this Radio Electronics April (1986) Fool's circuit?
I was a total sucker and breadboarded it to find out for myself :popcorn:

It has a really weird oscillating (ringing) output that seems to be the op-amp's noise low-pass filtered... but also with "amplitude-modulated astrophysical events"! Who can resist listening to that?
It's great for investigating microphonic capacitors. I put the output into an audio amp and surprised to lightly tap capacitors and hear it loudly, along with the gravity waves  ;)
 
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Online T3sl4co1l

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Re: Gravity-wave detector - Radio Electronics April 1986
« Reply #1 on: January 01, 2017, 01:26:06 am »
As it turns out, all those proposals (and weekend projects) that popped up over the years, were about 10^9 times too insensitive to actually see cool stuff out there.  But we've solved that, finally. 8)

Tim
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Offline Richard Crowley

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Re: Gravity-wave detector - Radio Electronics April 1986
« Reply #2 on: January 01, 2017, 01:33:30 am »
I have a friend who works at LIGO Hanford.  I am hoping she can arrange a tour sometime.

 

Online T3sl4co1l

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Re: Gravity-wave detector - Radio Electronics April 1986
« Reply #3 on: January 01, 2017, 02:13:56 am »
I would love to see the stabilization systems documented!

Tim
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Offline Seekonk

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Re: Gravity-wave detector - Radio Electronics April 1986
« Reply #4 on: January 01, 2017, 05:30:29 am »
I remember the Black Noise Generator, A loop of wire on a BNC mounted in a black bean soup can.
 

Offline Twoflower

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Re: Gravity-wave detector - Radio Electronics April 1986
« Reply #5 on: January 01, 2017, 02:52:43 pm »
I would love to see the stabilization systems documented!

Tim
Bad luck: the Omega Tau Podcast has half of the issues done in English. But this one is German. So if you understand German this is a very good Podcast covering the Small German Detector GEO600: Relativität und Gravitationswellen. Which does a lot of research which later will deployed to the other systems.

The suspension systems for Ligo and GEO600 are described here:
http://www.physics.gla.ac.uk/igr/index.php?L1=research&L2=suspensions

Additionally the mirrors are adjusted using magnetic and electrostatic fields. The latter is in development and currently only used in the GEO600. If my memory serves me right.
 


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