AI prirovnávajú k jadrovým technológiám. Lídri z techu varujú pred zánikom ľudstva
Technologickí lídri varujú pred hrozbou zániku ľudstva.
Kategórie: Veda v médiách
Prodekan: Použitie ChatGPT chápem ako evidentné porušenie pravidiel hry, ktoré sme zatiaľ nahlas nepomenovali
Rozhovor o používaní ChatGPT v školách.
Kategórie: Veda v médiách
Strašidelné chobotnice, gumené veveričky. V oceáne žijú tisíce tvorov, o ktorých sme doteraz nevedeli
Ohrozuje ich však ťažba na morskom dne.
Kategórie: Veda v médiách
Arašidové maslo odštartovalo debatu. Čo je vlastne kvapalina?
Čo je vlastne kvapalina?
Kategórie: Veda v médiách
Lenovo s dvomi obrazovkami: Displej pri klávesnici ukáže počasie aj kalkulačku
Pracovný nástroj pre náročných.
Kategórie: Veda v médiách
Hromada starých kmeňov veľkosti Manhattanu môže vypustiť až 3,4 milióna ton uhlíka
Drevo má aj viac ako tisícročie.
Kategórie: Veda v médiách
Vodná para aj prachové prstence. Webbov teleskop zaznamenal výnimočné objavy
Exoplanéta by mohla mať atmosféru.
Kategórie: Veda v médiách
Server Maintenance (June 1st, 2023)
Hello everyone,
We will be running server maintenance on June 1st, 2023 at 11:30 AM EDT.
Maintenance should be done by the end of the day.
An announcement will be made on this thread when maintenance is over.
Thanks,
Kevin
We will be running server maintenance on June 1st, 2023 at 11:30 AM EDT.
Maintenance should be done by the end of the day.
An announcement will be made on this thread when maintenance is over.
Thanks,
Kevin
Kategórie: Novinky z projektov
Pozrite sa, kto má na Slovensku najlepšie mobilné siete
Ste spokojní s internetom vo vašom smartfóne?
Kategórie: Veda v médiách
Nepretržitá čistá energia? Vedci zistili, ako sa dá vyrobiť elektrina zo vzduchu
Hrubou vrstvou vzdušnej vlhkosti je pokrytá celá zem.
Kategórie: Veda v médiách
Čína vyšle do vesmíru prvého civilistu. Experimentuje s nákladom
Vysokoškolský pracovník bude súčasťou trojčlennej posádky kozmickej lode Šen-čou 16, ktorá sa pripojí k stanici Tchien-kung.
Kategórie: Veda v médiách
Autá už myslia aj na chodcov, cyklistov a unaveného vodiča
Autá sú každý rok modernejšie nielen vzhľadom, ale najmä technológiami. Prvé husle však bude stále hrať bezpečnosť.
Kategórie: Veda v médiách
Vietor je v Británii prvýkrát hlavným zdrojom elektrickej energie
Veterné turbíny v Británii vyrábajú prvýkrát viac elektriny ako plyn. V prvých troch mesiacoch roka pochádzala tretina elektrickej energie v Spojenom kráľovstve z veterných fariem.
Kategórie: Veda v médiách
Španielsko otestuje suborbitálnu raketu, do dvoch rokov chce letieť na obežnú dráhu
Firma PLD Space tento mesiac úspešne vykonala zážihové skúšky.
Kategórie: Veda v médiách
Muskova firma Neuralink bude ľuďom do mozgov implantovať čipy. Dostala zelenú od americkej FDA
Americký úrad FDA firme Elona Muska umožní spustiť klinické testovanie mozgových implantátov, ktoré majú ľuďom prinavrátiť zrak a pohyblivosť.
Kategórie: Veda v médiách
Vedci našli baktérie, ktoré za bežných podmienok žerú plasty
Keby sa podarilo vedcom nájsť mikroorganizmy, ktoré pri izbovej teplote samé rozkladajú umelé hmoty, rýchlo by to pomohlo vyriešiť problém s nekonečnými skládkami.
Kategórie: Veda v médiách
Thanks for supporting SixTrack at [email protected] and updates
Dear volunteers,
All members of the SixTrack team would like to thank each of you for supporting our project at [email protected]. The last weeks saw a significant increase in work load, and your constant help did not pause even during the Christmas holidays, which is something that we really appreciate!
As you know, we are interested in simulating the dynamics of the beam in ultra-relativistic storage rings, like the LHC. As in other fields of physics, the dynamics is complex, and it can be decomposed into a linear and a non-linear part. The former allows the expected performance of the machine to be at reach, whereas the latter might dramatically affect the stability of the circulating beam. While the former can be analysed with the computing power of a laptop, the latter requires BOINC, and hence you! In fact, we perform very large scans of parameter spaces to see how non-linearities affect the motion of beam particles in different regions of the beam phase space and for different values of key machine parameters. Our main observable is the dynamic aperture (DA), i.e. the boundary between stable, i.e. bounded, and unstable, i.e., unbounded, motion of particles.
The studies mainly target the LHC and its upgrade in luminosity, the so-called HL-LHC. Thanks to this new accelerator, by ~2035, the LHC will be able to deliver to experiments x10 more data than what is foreseen in the first 10/15y of operation of LHC in a comparable time. We are in full swing in designing the upgraded machine, and the present operation of the LHC is a unique occasion to benchmark our models and simulation results. The deep knowledge of the DA of the LHC is essential to properly tune the working point of the HL-LHC.
If you have crunched simulations named "workspace1_hl13_collision_scan_*" (Frederik), then you have helped us in mapping the effects of unavoidable magnetic errors expected from the new hardware of the HL-LHC on dynamic aperture, and identify the best working point of the machine and correction strategies. Tasks named like "w2_hllhc10_sqz700_Qinj_chr20_w2*" (Yuri) focus the attention onto the magnets responsible for squeezing the beams before colliding them; due to their prominent role, these magnets, very few in number, have such a big impact on the non-linear dynamics that the knobs controlling the linear part of the machine can offer relevant remedial strategies.
Many recent tasks are aimed at relating the beam lifetime to the dynamic aperture. The beam lifetime is a measured quantity that tells us how long the beams are going to stay in the machine, based on the current rate of losses. A theoretical model relating beam lifetime and dynamic aperture was developed; a large simulation campaign has started, to benchmark the model against plenty of measurements taken with the LHC in the past three years. One set of studies, named "w16_ats2017_b2_qp_0_ats2017_b2_QP_0_IOCT_0" (Pascal), considers as main source of non-linearities the unavoidable multipolar errors of the magnets, whereas tasks named as "LHC_2015*" (Javier) take into account the parasitic encounters nearby the collision points, i.e. the so called "long-range beam-beam effects".
One of our users (Ewen) is carrying out two studies thanks to your help. In 2017 DA was directly measured for the first time in the LHC at top energy, and nonlinear magnets on either side of ATLAS and CMS experiments were used to vary the DA. He wants to see how well the simulated DA compares to these measurements. The second study seeks to look systematically at how the time dependence of DA in simulation depends on the strength of linear transverse coupling, and the way it is generated in the machine. In fact, some previous simulations and measurements at injection energy have indicated that linear coupling between the horizontal and vertical planes can have a large impact on how the dynamic aperture evolves over time.
In all this, your help is fundamental, since you let us carry out the simulations and studies we are interested in, running the tasks we submit to BOINC. Hence, the warmest "thank you" to you all!
Happy crunching to everyone, and stay tuned!
Alessio and Massimo, for the LHC SixTrack team.
All members of the SixTrack team would like to thank each of you for supporting our project at [email protected]. The last weeks saw a significant increase in work load, and your constant help did not pause even during the Christmas holidays, which is something that we really appreciate!
As you know, we are interested in simulating the dynamics of the beam in ultra-relativistic storage rings, like the LHC. As in other fields of physics, the dynamics is complex, and it can be decomposed into a linear and a non-linear part. The former allows the expected performance of the machine to be at reach, whereas the latter might dramatically affect the stability of the circulating beam. While the former can be analysed with the computing power of a laptop, the latter requires BOINC, and hence you! In fact, we perform very large scans of parameter spaces to see how non-linearities affect the motion of beam particles in different regions of the beam phase space and for different values of key machine parameters. Our main observable is the dynamic aperture (DA), i.e. the boundary between stable, i.e. bounded, and unstable, i.e., unbounded, motion of particles.
The studies mainly target the LHC and its upgrade in luminosity, the so-called HL-LHC. Thanks to this new accelerator, by ~2035, the LHC will be able to deliver to experiments x10 more data than what is foreseen in the first 10/15y of operation of LHC in a comparable time. We are in full swing in designing the upgraded machine, and the present operation of the LHC is a unique occasion to benchmark our models and simulation results. The deep knowledge of the DA of the LHC is essential to properly tune the working point of the HL-LHC.
If you have crunched simulations named "workspace1_hl13_collision_scan_*" (Frederik), then you have helped us in mapping the effects of unavoidable magnetic errors expected from the new hardware of the HL-LHC on dynamic aperture, and identify the best working point of the machine and correction strategies. Tasks named like "w2_hllhc10_sqz700_Qinj_chr20_w2*" (Yuri) focus the attention onto the magnets responsible for squeezing the beams before colliding them; due to their prominent role, these magnets, very few in number, have such a big impact on the non-linear dynamics that the knobs controlling the linear part of the machine can offer relevant remedial strategies.
Many recent tasks are aimed at relating the beam lifetime to the dynamic aperture. The beam lifetime is a measured quantity that tells us how long the beams are going to stay in the machine, based on the current rate of losses. A theoretical model relating beam lifetime and dynamic aperture was developed; a large simulation campaign has started, to benchmark the model against plenty of measurements taken with the LHC in the past three years. One set of studies, named "w16_ats2017_b2_qp_0_ats2017_b2_QP_0_IOCT_0" (Pascal), considers as main source of non-linearities the unavoidable multipolar errors of the magnets, whereas tasks named as "LHC_2015*" (Javier) take into account the parasitic encounters nearby the collision points, i.e. the so called "long-range beam-beam effects".
One of our users (Ewen) is carrying out two studies thanks to your help. In 2017 DA was directly measured for the first time in the LHC at top energy, and nonlinear magnets on either side of ATLAS and CMS experiments were used to vary the DA. He wants to see how well the simulated DA compares to these measurements. The second study seeks to look systematically at how the time dependence of DA in simulation depends on the strength of linear transverse coupling, and the way it is generated in the machine. In fact, some previous simulations and measurements at injection energy have indicated that linear coupling between the horizontal and vertical planes can have a large impact on how the dynamic aperture evolves over time.
In all this, your help is fundamental, since you let us carry out the simulations and studies we are interested in, running the tasks we submit to BOINC. Hence, the warmest "thank you" to you all!
Happy crunching to everyone, and stay tuned!
Alessio and Massimo, for the LHC SixTrack team.
Kategórie: Novinky z projektov
[email protected] down-time due to system updates
Tomorrow Wednesday 24/1, the [email protected] servers will be unavailable for a short period while our storage backend is taken down for a system update.
Today, Tuesday 23/1, some of the Condor servers that handle CMS, LHCb and Theory tasks will be down for a while. Regarding the on-going issues with upload of files, please refer to this thread.
Thanks for your understanding and happy crunching!
Today, Tuesday 23/1, some of the Condor servers that handle CMS, LHCb and Theory tasks will be down for a while. Regarding the on-going issues with upload of files, please refer to this thread.
Thanks for your understanding and happy crunching!
Kategórie: Novinky z projektov