🛰 آیا ستاره های نزدیک می توانند سیاره های فراخورشیدی قابل سکونت داشته باشند؟ رصدخانه اشعه ایکس چاندرا ناسا امیدوار است به این موضوع پی ببرد 🛰
لینک گزارش
@PDATLAB
لینک گزارش
@PDATLAB
Space.com
Could nearby stars have habitable exoplanets? NASA's Chandra X-ray Observatory hopes to find out
By looking at stars' radiation, astronomers are hoping to determine potential exoplanet habitability.
School of Particles and Accelerators
Theory Weekly Seminar / Hybrid Format
Date:
Sunday, June 23, 2024 / یکشنبه، 3 تیر 1403
Time:
03:00 PM – 04:00 PM (Tehran time)
Speaker:
Mr. Amirhosein Mousavi
Affiliation:
School of Particles and Accelerator, IPM
Title:
A new paradox in classical electrodynamics
Title in Persian:
پارادوکس جدید در الکترودینامیک کلاسیک
Abstract:
In this talk, after reviewing some apparently paradoxical aspects of classical electrodynamics and their resolutions, I will introduce a new paradox concerning the energy conservation in classical electrodynamics which doesn't seem to be just an apparent one. Indeed, it seems that one can find neither a resolution inside the theory nor by delivering the problem to more fundamental theories like quantum theory and QFT. Calculations for various arrangements are done via CST, and also one arrangement is designed so that analytical solutions are possible. Also, all discerned loopholes are lifted and, in fact, the paradox appears to be dramatically serious. Finally, some possible origins of the appearance of such paradoxes are discussed and we argue that no one of them merit to resolve the paradox as they seem at first glance. Therefore, our suggestion is that in a situation where one decides to elicit surplus energy out of the above-mentioned arrangements in a laboratory, some "technical limitations" can arise and these limitations are so fundamental to put new rules for defining the validity region of the theory of electrodynamics. Obviously if there appears no fundamental limitation, then it means that we have found a perpetual source (or even sink) of energy!
Meeting Place: Seminar Room, School of Particles and Accelerators, IPM
Link to Join Virtually: https://meet.google.com/bda-vsem-tuv
Theory Weekly Seminar / Hybrid Format
Date:
Sunday, June 23, 2024 / یکشنبه، 3 تیر 1403
Time:
03:00 PM – 04:00 PM (Tehran time)
Speaker:
Mr. Amirhosein Mousavi
Affiliation:
School of Particles and Accelerator, IPM
Title:
A new paradox in classical electrodynamics
Title in Persian:
پارادوکس جدید در الکترودینامیک کلاسیک
Abstract:
In this talk, after reviewing some apparently paradoxical aspects of classical electrodynamics and their resolutions, I will introduce a new paradox concerning the energy conservation in classical electrodynamics which doesn't seem to be just an apparent one. Indeed, it seems that one can find neither a resolution inside the theory nor by delivering the problem to more fundamental theories like quantum theory and QFT. Calculations for various arrangements are done via CST, and also one arrangement is designed so that analytical solutions are possible. Also, all discerned loopholes are lifted and, in fact, the paradox appears to be dramatically serious. Finally, some possible origins of the appearance of such paradoxes are discussed and we argue that no one of them merit to resolve the paradox as they seem at first glance. Therefore, our suggestion is that in a situation where one decides to elicit surplus energy out of the above-mentioned arrangements in a laboratory, some "technical limitations" can arise and these limitations are so fundamental to put new rules for defining the validity region of the theory of electrodynamics. Obviously if there appears no fundamental limitation, then it means that we have found a perpetual source (or even sink) of energy!
Meeting Place: Seminar Room, School of Particles and Accelerators, IPM
Link to Join Virtually: https://meet.google.com/bda-vsem-tuv
Google
Real-time meetings by Google. Using your browser, share your video, desktop, and presentations with teammates and customers.
Wednesday Weekly Seminar / Virtual format
Date:
Wednesday, Jun 26, 2024 / چهارشنبه، 6 تیر 1403
Time:
11:00 AM - 12:00 PM (Tehran time)
Speaker:
Dr. Sasan Ahmadian
Affiliation:
School of Particles and Accelerators, IPM
Title:
Towards a Greener Future: Sustainability in Particle Accelerator Design and operation
Title in Persian:
به سوی آینده ای سبز تر: پایداری در طراحی و عملکرد شتابدهنده های ذرات
Abstract:
Sustainability in particle accelerator facilities is essential for advancing scientific research while minimizing environmental impact. This involves implementing energy-efficient technologies, optimizing resource use, and adopting sustainable practices in facility operations. By reducing energy consumption, utilizing renewable energy sources, and managing waste effectively, particle accelerators can significantly lower their carbon footprint. Furthermore, integrating sustainable design principles in the construction and maintenance of these facilities ensures long-term environmental stewardship. This presentation explores various strategies and innovations that enhance the sustainability of particle accelerator facilities, highlighting their role in promoting eco-friendly scientific advancement.
Indico Link: https://indico.hep.ipm.ir/e/s.ahmadian
Link to Join Virtually: https://meet.google.com/bda-vsem-tuv
Date:
Wednesday, Jun 26, 2024 / چهارشنبه، 6 تیر 1403
Time:
11:00 AM - 12:00 PM (Tehran time)
Speaker:
Dr. Sasan Ahmadian
Affiliation:
School of Particles and Accelerators, IPM
Title:
Towards a Greener Future: Sustainability in Particle Accelerator Design and operation
Title in Persian:
به سوی آینده ای سبز تر: پایداری در طراحی و عملکرد شتابدهنده های ذرات
Abstract:
Sustainability in particle accelerator facilities is essential for advancing scientific research while minimizing environmental impact. This involves implementing energy-efficient technologies, optimizing resource use, and adopting sustainable practices in facility operations. By reducing energy consumption, utilizing renewable energy sources, and managing waste effectively, particle accelerators can significantly lower their carbon footprint. Furthermore, integrating sustainable design principles in the construction and maintenance of these facilities ensures long-term environmental stewardship. This presentation explores various strategies and innovations that enhance the sustainability of particle accelerator facilities, highlighting their role in promoting eco-friendly scientific advancement.
Indico Link: https://indico.hep.ipm.ir/e/s.ahmadian
Link to Join Virtually: https://meet.google.com/bda-vsem-tuv
Indico
Wednesday weekly meeting
Weekly general meeting of the school of particles and accelerators (virtual) Link to join: https://meet.google.com/bda-vsem-tuv
Journal Club: Experiments & Phenomenology / Hybrid format
Date:
Monday, Jun 24, 2024 /دوشنبه، 4 تیر 1403
Time:
11:00 AM - 12:00 PM (Tehran time)
Speaker:
Dr. Hossein Karimi
Affiliation:
Iranian Light Source Facility & School of Particles and Accelerators, IPM
Title:
The Pressure Profile Simulations and Heat-Load Study in the Vacuum System Design for Iranian Light Source Facility (ILSF)
Title in Persian:
شبیه سازی پروفایل فشار و بررسی بار حرارتی در طراحی سیستم خلاء چشمه نور ایران
Abstract:
In the process of designing the vacuum system for a synchrotron light source, it is essential to accurately estimate the pressure profile in the vacuum chambers. This is where simulation software plays a critical role. Among the various options available, Molflow and Synrad are standout programs widely used for this purpose. These software have also been used in the vacuum system design of ILSF, and will be showcased in detail in this presentation.
Another crucial consideration in designing the vacuum system is to handle the radiated power generated in dipole magnets and Insertion Devices (IDs). In this case, the photon absorbers are used to protect the vacuum equipment from the radiated power. As this photon absorber receives a high amount of power, several optimizations must be performed in their design to reduce the thermal stress and increase their operation lifetime. These optimizations will be achieved through finite element analysis, a topic that will be thoroughly discussed in this lecture.
Meeting Place: Seminar Room, School of Particles and Accelerators, IPM
Link to Join Virtually: https://meet.google.com/bda-vsem-tuv
Date:
Monday, Jun 24, 2024 /دوشنبه، 4 تیر 1403
Time:
11:00 AM - 12:00 PM (Tehran time)
Speaker:
Dr. Hossein Karimi
Affiliation:
Iranian Light Source Facility & School of Particles and Accelerators, IPM
Title:
The Pressure Profile Simulations and Heat-Load Study in the Vacuum System Design for Iranian Light Source Facility (ILSF)
Title in Persian:
شبیه سازی پروفایل فشار و بررسی بار حرارتی در طراحی سیستم خلاء چشمه نور ایران
Abstract:
In the process of designing the vacuum system for a synchrotron light source, it is essential to accurately estimate the pressure profile in the vacuum chambers. This is where simulation software plays a critical role. Among the various options available, Molflow and Synrad are standout programs widely used for this purpose. These software have also been used in the vacuum system design of ILSF, and will be showcased in detail in this presentation.
Another crucial consideration in designing the vacuum system is to handle the radiated power generated in dipole magnets and Insertion Devices (IDs). In this case, the photon absorbers are used to protect the vacuum equipment from the radiated power. As this photon absorber receives a high amount of power, several optimizations must be performed in their design to reduce the thermal stress and increase their operation lifetime. These optimizations will be achieved through finite element analysis, a topic that will be thoroughly discussed in this lecture.
Meeting Place: Seminar Room, School of Particles and Accelerators, IPM
Link to Join Virtually: https://meet.google.com/bda-vsem-tuv
Google
Real-time meetings by Google. Using your browser, share your video, desktop, and presentations with teammates and customers.
❇️ سیاهچاله های باستانی "هیولا" کشف شدند: ستاره شناسان MIT نور ستاره های گریزان از اختروش های اولیه را ضبط کردند ❇️
لینک گزارش
@PDATLAB
لینک گزارش
@PDATLAB
SciTechDaily
Ancient “Monster” Black Holes Revealed: MIT Astronomers Capture Elusive Starlight From Early Quasars
Ancient starlight from the earliest quasars has been captured by MIT astronomers, revealing that some of earliest “monster” black holes likely grew from massive cosmic seeds. MIT astronomers have observed the faint starlight surrounding some of the earliest…
💫 آزمایشگاه PDAT دو موقعیت خالی با موضوع تحقیقاتی آنالیز داده های کسر هیدروژن خنثی در دوره بازیونش کیهانی دارد 💫
✨ متقاضیان میتوانند جهت ارسال درخواست خود برای ورود به این حوزه، رزومه خود را برای اکانت تلگرامی زیر ارسال بفرمایند ✨
@pdatlaboratory
💥 مهلت ارسال درخواست ها: ۱۳ ام تیر ماه 💥
✨ متقاضیان میتوانند جهت ارسال درخواست خود برای ورود به این حوزه، رزومه خود را برای اکانت تلگرامی زیر ارسال بفرمایند ✨
@pdatlaboratory
💥 مهلت ارسال درخواست ها: ۱۳ ام تیر ماه 💥
دانشکده فیزیک
سمینار کیهانشناسی و اخترفیزیک
امواج گرانشی حاصل از تورم غیر جاذب و داده های نانوگرو (بخش دوم)
Induced gravitational waves from non-attractor inflation and NANOGrav data
دکتر امین نصیری
دانشکده فیزیک، دانشگاه صنعتی خواجه نصیر
چکیده: در این سخنرانی در مورد امواج گرانشی حاصل از تورم غیر جاذب صحبت خواهم کرد. به این منظور ابتدا مرور مختصری بر تورم و تورم غیر جاذب خواهم داشت. در ادامه در مورد آرایه زمان سنجی تپ اخترها به عنوان آشکارسازی برای امواج گرانشی صحبت خواهم کرد. در پایان در مورد پیش بینی تورم غیر جاذب در مورد امواج گرانشی صحبت کرده و نتایج را با داده های نانوگرو مقایسه خواهم کرد.
Abstract: In this talk I will talk about the induced gravitational waves from non-attractor inflation. To this end firstly, I will give a brief review about inflation and the non- attractor inflation. Then I will talk about the pulsar timing arrays as a detector of gravitational waves. Finally I will proceed with prediction of non-attractor inflation for the induced gravitational waves and compare the results with the data of NANOGrav.
زمان: ۴ تیر ۱۴۰۳ – ساعت ۱۶ الی ۱۷
مکان: سالن اجتماعات دکتر ابوالحسنی
حضور مجازی: meet.google.com/phx-pdzw-cwg
سمینار کیهانشناسی و اخترفیزیک
امواج گرانشی حاصل از تورم غیر جاذب و داده های نانوگرو (بخش دوم)
Induced gravitational waves from non-attractor inflation and NANOGrav data
دکتر امین نصیری
دانشکده فیزیک، دانشگاه صنعتی خواجه نصیر
چکیده: در این سخنرانی در مورد امواج گرانشی حاصل از تورم غیر جاذب صحبت خواهم کرد. به این منظور ابتدا مرور مختصری بر تورم و تورم غیر جاذب خواهم داشت. در ادامه در مورد آرایه زمان سنجی تپ اخترها به عنوان آشکارسازی برای امواج گرانشی صحبت خواهم کرد. در پایان در مورد پیش بینی تورم غیر جاذب در مورد امواج گرانشی صحبت کرده و نتایج را با داده های نانوگرو مقایسه خواهم کرد.
Abstract: In this talk I will talk about the induced gravitational waves from non-attractor inflation. To this end firstly, I will give a brief review about inflation and the non- attractor inflation. Then I will talk about the pulsar timing arrays as a detector of gravitational waves. Finally I will proceed with prediction of non-attractor inflation for the induced gravitational waves and compare the results with the data of NANOGrav.
زمان: ۴ تیر ۱۴۰۳ – ساعت ۱۶ الی ۱۷
مکان: سالن اجتماعات دکتر ابوالحسنی
حضور مجازی: meet.google.com/phx-pdzw-cwg
Google
Real-time meetings by Google. Using your browser, share your video, desktop, and presentations with teammates and customers.
علاقهمندید کدام محتویات زیر را بیشتر در کانال ببینید؟
anonymous poll
موقعیتهای دکترا و پسادکترا در کشورهای مختلف – 17
👍👍👍👍👍👍👍 40%
اطلاع رسانی سمینارها و وبینارهای علمی – 10
👍👍👍👍 24%
اخبار دنیای اخترفیزیک و کیهانشناسی – 8
👍👍👍 19%
آخرین مقالات آرکایوی منتشر شده در حوزه اخترفیزیک و کیهانشناسی – 5
👍👍 12%
اخبار دنیای علم به صورت کلی – 2
👍 5%
👥 42 people voted so far.
anonymous poll
موقعیتهای دکترا و پسادکترا در کشورهای مختلف – 17
👍👍👍👍👍👍👍 40%
اطلاع رسانی سمینارها و وبینارهای علمی – 10
👍👍👍👍 24%
اخبار دنیای اخترفیزیک و کیهانشناسی – 8
👍👍👍 19%
آخرین مقالات آرکایوی منتشر شده در حوزه اخترفیزیک و کیهانشناسی – 5
👍👍 12%
اخبار دنیای علم به صورت کلی – 2
👍 5%
👥 42 people voted so far.