<![CDATA[Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol.]]>Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol.

(AFAIU this was an experiment for a software retrofit to hardware otherwise incapable of such adjustments)

Link Preview Image
]]>https://board.circlewithadot.net/topic/d98e99c0-b74d-4783-be53-df8c7b71485d/stopping-the-system-fans-to-heat-up-the-system-to-shift-clock-phase-by-a-few-femtoseconds-is-one-of-the-less-hinged-ideas-i-ve-seen-come-out-of-cern-lol.RSS for NodeFri, 15 May 2026 05:30:06 GMTWed, 13 May 2026 14:17:49 GMT60<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Thu, 14 May 2026 11:48:14 GMT]]>@jaseg I am impressed.

]]>https://board.circlewithadot.net/post/https://infosec.exchange/users/ela/statuses/116572769144806698https://board.circlewithadot.net/post/https://infosec.exchange/users/ela/statuses/116572769144806698Thu, 14 May 2026 11:48:14 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Thu, 14 May 2026 11:26:15 GMT]]>@jaseg no, this makes sense 🫠]]>https://board.circlewithadot.net/post/https://cute-spellcasting-ideas.eu/notes/am8yvv3x1rze8101https://board.circlewithadot.net/post/https://cute-spellcasting-ideas.eu/notes/am8yvv3x1rze8101Thu, 14 May 2026 11:26:15 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Thu, 14 May 2026 11:17:52 GMT]]>@davidr about half an hour I think. The original slides are linked down thread.

]]>https://board.circlewithadot.net/post/https://chaos.social/users/jaseg/statuses/116572649689319650https://board.circlewithadot.net/post/https://chaos.social/users/jaseg/statuses/116572649689319650Thu, 14 May 2026 11:17:52 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Thu, 14 May 2026 11:13:43 GMT]]>@jaseg This is really neat! What's the scale of the x axis?

]]>https://board.circlewithadot.net/post/https://hachyderm.io/users/davidr/statuses/116572633382164031https://board.circlewithadot.net/post/https://hachyderm.io/users/davidr/statuses/116572633382164031Thu, 14 May 2026 11:13:43 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Thu, 14 May 2026 11:10:49 GMT]]>@jaseg That's actually not to strange of an idea. Some types of tunable lasers are also tuned via temperature.
Also many years ago there was some paper about determining the location of a computer based on the drift of their clock. Essentially the idea was that room temperature changes with the sun and therefore you can find out of it's day or night. Based on that you can find out the location.

]]>https://board.circlewithadot.net/post/https://f-ckendehoelle.de/users/casandro/statuses/116572621961849006https://board.circlewithadot.net/post/https://f-ckendehoelle.de/users/casandro/statuses/116572621961849006Thu, 14 May 2026 11:10:49 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Thu, 14 May 2026 10:21:04 GMT]]>@f4grx @jaseg gotta make do! *unhinged hacks ensue*]]>https://board.circlewithadot.net/post/https://soc.kouett.net.eu.org/objects/fc67e8fb-f07e-454f-a751-12ee183ce2cbhttps://board.circlewithadot.net/post/https://soc.kouett.net.eu.org/objects/fc67e8fb-f07e-454f-a751-12ee183ce2cbThu, 14 May 2026 10:21:04 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Thu, 14 May 2026 09:13:06 GMT]]>@jaseg physicists will do anything to gain a few femtoseconds.

]]>https://board.circlewithadot.net/post/https://en.osm.town/users/owiecc/statuses/116572159097876473https://board.circlewithadot.net/post/https://en.osm.town/users/owiecc/statuses/116572159097876473Thu, 14 May 2026 09:13:06 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Thu, 14 May 2026 09:11:38 GMT]]>@jaseg i think lady heather is doing fan temperature control for timing stuff for a while.

]]>https://board.circlewithadot.net/post/https://aschaffenburg.social/users/dg3hda/statuses/116572153362588914https://board.circlewithadot.net/post/https://aschaffenburg.social/users/dg3hda/statuses/116572153362588914Thu, 14 May 2026 09:11:38 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Thu, 14 May 2026 08:22:12 GMT]]>@jaseg how very CERN lol

]]>https://board.circlewithadot.net/post/https://chaos.social/users/f4grx/statuses/116571958946273221https://board.circlewithadot.net/post/https://chaos.social/users/f4grx/statuses/116571958946273221Thu, 14 May 2026 08:22:12 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Thu, 14 May 2026 08:17:00 GMT]]>@jaseg Proper madness from the devs at CERN. I always like it when there is a common goal and someone is like "let me try something ridiculous so it fits our budget." - Vi

]]>https://board.circlewithadot.net/post/https://tacobelllabs.net/users/helle/statuses/116571938501406715https://board.circlewithadot.net/post/https://tacobelllabs.net/users/helle/statuses/116571938501406715Thu, 14 May 2026 08:17:00 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Thu, 14 May 2026 03:01:23 GMT]]>@jaseg that's a slick idea ⌚

]]>https://board.circlewithadot.net/post/https://pnw.zone/users/mancube/statuses/116570697451743801https://board.circlewithadot.net/post/https://pnw.zone/users/mancube/statuses/116570697451743801Thu, 14 May 2026 03:01:23 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Thu, 14 May 2026 01:50:54 GMT]]>@jaseg Wat.

]]>https://board.circlewithadot.net/post/https://toot.cat/users/riley/statuses/116570420292089367https://board.circlewithadot.net/post/https://toot.cat/users/riley/statuses/116570420292089367Thu, 14 May 2026 01:50:54 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Thu, 14 May 2026 01:12:38 GMT]]>@jaseg@chaos.social Wow, neat.

Obligatory xkcd:

Link Preview Image
]]>https://board.circlewithadot.net/post/https://akkoma.tubul.net/objects/e4e3eb2d-a562-4674-b0b6-74cce62f09cdhttps://board.circlewithadot.net/post/https://akkoma.tubul.net/objects/e4e3eb2d-a562-4674-b0b6-74cce62f09cdThu, 14 May 2026 01:12:38 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Wed, 13 May 2026 20:25:16 GMT]]>@jaseg I see. Thanks for explaining. ^^

]]>https://board.circlewithadot.net/post/https://urusai.social/ap/users/116430373895248336/statuses/116569139900526311https://board.circlewithadot.net/post/https://urusai.social/ap/users/116430373895248336/statuses/116569139900526311Wed, 13 May 2026 20:25:16 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Wed, 13 May 2026 20:19:05 GMT]]>@John_Ligher I think if you can avoid it there are better ways to achieve the same result. AFAIU this was meant as a retrofit for boards that lacked the necessary circuitry to do this in a nicer way.

]]>https://board.circlewithadot.net/post/https://chaos.social/users/jaseg/statuses/116569115575505139https://board.circlewithadot.net/post/https://chaos.social/users/jaseg/statuses/116569115575505139Wed, 13 May 2026 20:19:05 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Wed, 13 May 2026 19:58:11 GMT]]>@jaseg Which kind of implementations could this be used for?

]]>https://board.circlewithadot.net/post/https://urusai.social/ap/users/116430373895248336/statuses/116569033385663624https://board.circlewithadot.net/post/https://urusai.social/ap/users/116430373895248336/statuses/116569033385663624Wed, 13 May 2026 19:58:11 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Wed, 13 May 2026 18:03:39 GMT]]>@jaseg @coral See https://indico.belle2.org/event/10782/contributions/74815/attachments/27775/41084/LHCb_Giessen.pdf for some info on how they are used and where they are installed.

and https://indico.cern.ch/event/681247/contributions/2929079/attachments/1639220/2616679/PCIe40_Common_Readout_for_LHCb_and_Alice.pdf for more card specific info

]]>https://board.circlewithadot.net/post/https://chaos.social/users/evey/statuses/116568583011401548https://board.circlewithadot.net/post/https://chaos.social/users/evey/statuses/116568583011401548Wed, 13 May 2026 18:03:39 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Wed, 13 May 2026 18:01:33 GMT]]>@jaseg @coral This those readout cards are stupidly expensive, next upgrade for HL-LHC they will be upgraded to next gen cards but yea even then.

]]>https://board.circlewithadot.net/post/https://chaos.social/users/evey/statuses/116568574773253391https://board.circlewithadot.net/post/https://chaos.social/users/evey/statuses/116568574773253391Wed, 13 May 2026 18:01:33 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Wed, 13 May 2026 17:07:46 GMT]]>@jaseg something something xkcd emacs spacebar heating

]]>https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116568363241937273https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116568363241937273Wed, 13 May 2026 17:07:46 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Wed, 13 May 2026 15:29:53 GMT]]>@Gyroplast an OCXO will give you much better phase noise than a PLL, but the difficulty is synchronizing them. In these experiments, they have hundreds or thousands of boards synchronized to a common reference clock.

]]>https://board.circlewithadot.net/post/https://chaos.social/users/jaseg/statuses/116567978360490969https://board.circlewithadot.net/post/https://chaos.social/users/jaseg/statuses/116567978360490969Wed, 13 May 2026 15:29:53 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Wed, 13 May 2026 15:28:13 GMT]]>@coral I think the scenario of this experiment was that they already had a large number of boards deployed that were lacking “proper” hardware capabilities for this kind of fine-grained adjustment and they evaluated retrofitting that capability to these exising boards in software.

]]>https://board.circlewithadot.net/post/https://chaos.social/users/jaseg/statuses/116567971802041996https://board.circlewithadot.net/post/https://chaos.social/users/jaseg/statuses/116567971802041996Wed, 13 May 2026 15:28:13 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Wed, 13 May 2026 15:26:54 GMT]]>@jaseg

"We have OCXO at home."

]]>https://board.circlewithadot.net/post/https://furry.engineer/users/Gyroplast/statuses/116567966618227369https://board.circlewithadot.net/post/https://furry.engineer/users/Gyroplast/statuses/116567966618227369Wed, 13 May 2026 15:26:54 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Wed, 13 May 2026 15:26:24 GMT]]>@coral here you go: https://chaos.social/@jaseg/116567746676154596

]]>https://board.circlewithadot.net/post/https://chaos.social/users/jaseg/statuses/116567964687056100https://board.circlewithadot.net/post/https://chaos.social/users/jaseg/statuses/116567964687056100Wed, 13 May 2026 15:26:24 GMT<![CDATA[Reply to Stopping the system fans to heat up the system to shift clock phase by a few femtoseconds is one of the less hinged ideas I’ve seen come out of CERN lol. on Wed, 13 May 2026 15:25:40 GMT]]>@jaseg link to slides? (why not add controllably high-switching nets near the PPL's, or did that not work)? EDIT: saw you posted in thread https://indico.cern.ch/event/1606914/contributions/6771542/attachments/3178052/5652347/2025.11.19_SAMBA_HPTD.pdf

]]>https://board.circlewithadot.net/post/https://empty.cafe/users/coral/statuses/116567961783317524https://board.circlewithadot.net/post/https://empty.cafe/users/coral/statuses/116567961783317524Wed, 13 May 2026 15:25:40 GMT