Questions and Answers : Sixtrack : Very quick tasks - Six Track - Normal????
Message board moderation

To post messages, you must log in.

AuthorMessage
Burch

Send message
Joined: 9 Aug 08
Posts: 5
Credit: 641,233
RAC: 0
Message 26114 - Posted: 10 Jan 2014, 20:17:04 UTC

I have SixTrack tasks in ready-to-report state with elapsed times of 10, 12, 23, and 24 seconds. Many others are in the 50-something minute range. Is this expected? Or is there something wrong with the very quick runs? Just curious.
ID: 26114 · Report as offensive     Reply Quote
henry

Send message
Joined: 15 Sep 13
Posts: 73
Credit: 5,763
RAC: 0
Message 26115 - Posted: 11 Jan 2014, 3:37:07 UTC - in response to Message 26114.  

Tasks that end that quickly are said to represent simulations where the particles did not stay focused and hit the wall. They are normal. Some batches of tasks seem to have a relatively high percentage of very quick tasks while other batches seem to have a small percentage.

6 bangers are for wussies.
ID: 26115 · Report as offensive     Reply Quote
Burch

Send message
Joined: 9 Aug 08
Posts: 5
Credit: 641,233
RAC: 0
Message 26124 - Posted: 14 Jan 2014, 19:23:12 UTC - in response to Message 26115.  

Thanks Henry.
ID: 26124 · Report as offensive     Reply Quote
kyrsjo
Project administrator
Project developer
Project tester
Project scientist

Send message
Joined: 23 Jan 17
Posts: 29
Credit: 375,570
RAC: 0
Message 28957 - Posted: 22 Feb 2017, 8:58:06 UTC

Yeah, the goal of the SixTrack simulations is pretty much to find out how far out we can place the particles before they get lost by hitting the walls. This happens because at some amplitude, nonlinearities in the machine (magnet errors etc.) causes the particle amplitudes to grow exponentially. This is known as the "dynamic aperture" of the machine.

We can then study different optics settings, the effects of imperfections in the construction of the machine and in various equipment etc.
ID: 28957 · Report as offensive     Reply Quote
Bogdan

Send message
Joined: 1 May 15
Posts: 6
Credit: 49,316
RAC: 0
Message 32295 - Posted: 5 Sep 2017, 22:19:25 UTC

I had about 20 tasks the completed instantly please look at task:
Task 154781705

Thank you!
ID: 32295 · Report as offensive     Reply Quote

Questions and Answers : Sixtrack : Very quick tasks - Six Track - Normal????


©2020 CERN