A modulated neutron initiator is a neutron source capable of producing a burst of neutrons on activation. It is a crucial part of some nuclear weapons, as its role is to "kick-start" the chain reaction at the optimal moment when the configuration is prompt critical. It is also known as an internal neutron initiator. The initiator is typically placed in the center of the plutonium pit, and is activated by impact of the converging shock wave. One of the key elements in the proper operation of a nuclear weapon is initiation of the fission chain reaction at the proper time. To obtain a significant nuclear yield, sufficient neutrons must be present within the supercritical core at the right time. If the chain reaction starts too soon ("predetonation"), the result will be only a 'fizzle yield', well below the design specification. If it occurs too late, the core will have begun to expand and disassemble into a less-dense state, leading to a lowered yield (less of the core material undergoes fission) or no yield at all (the core is no longer a critical mass). Therefore, low spontaneous neutron emission of the pit material is crucial. For boosted fission weapons, the size of the centrally placed initiator is critical and has to be as small as possible. The use of an external neutron source allows more flexibility, such as variable yields. (Wikipedia).
Modular Exponentiation Quiz - Applied Cryptography
This video is part of an online course, Applied Cryptography. Check out the course here: https://www.udacity.com/course/cs387.
From playlist Applied Cryptography
Solution to problems dealing with the Doppler effect.
From playlist Physics - Waves
Solution to problems dealing with the Doppler effect.
From playlist Physics - Waves
What is an Injective Function? Definition and Explanation
An explanation to help understand what it means for a function to be injective, also known as one-to-one. The definition of an injection leads us to some important properties of injective functions! Subscribe to see more new math videos! Music: OcularNebula - The Lopez
From playlist Functions
Definition of an estimator. Examples of estimators. Definition of an unbiased estimator.
From playlist Machine Learning
Nuclear Physics B2 Nuclear Binding Energy and Mass Defect
Nuclear binding energy and mass defect.
From playlist Physics - Nuclear Physics and Radioactivity
Richard Hain: Modular inverters
The lecture was held within the framework of the Hausdorff Trimester Program: Periods in Number Theory, Algebraic Geometry and Physics. Abstract: This is a report on a project that is joint with Francis Brown. A modular inverter is a genus 1 analogue of an associator. There is a canonical
From playlist Workshop: "Periods and Regulators"
Nuclear Physics B4 Radioactivity
Radioactive decay.
From playlist Physics - Nuclear Physics and Radioactivity
Implantable defibrillator teardown
Inside an implantable heart pacemaker/defibrillator
From playlist Medical stuff
Answers to HSC PHYSICS Multiple choices with explanations
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From playlist HSC Physics Exam Questions
Sukanta Bose: Physics and astrophysics from networks of second generation gravitational wave
PROGRAM: NUMERICAL RELATIVITY DATES: Monday 10 Jun, 2013 - Friday 05 Jul, 2013 VENUE: ICTS-TIFR, IISc Campus, Bangalore DETAL Numerical relativity deals with solving Einstein's field equations using supercomputers. Numerical relativity is an essential tool for the accurate modeling of a wi
From playlist Numerical Relativity
Prospects for Observation of Continuous Gravitational Waves from Spinning Neutron.. by Aditya Sharma
ICTS In-house 2022 Organizers: Chandramouli, Omkar, Priyadarshi, Tuneer Date and Time: 20th to 22nd April, 2022 Venue: Ramanujan Hall inhouse@icts.res.in An exclusive three-day event to exchange ideas and research topics amongst members of ICTS.
From playlist ICTS In-house 2022
Physics and astrophysics....(Course 2 - EM counterparts) - Lecture 1 by Kenta Hotokezaka
ORGANIZERS : Parameswaran Ajith, K. G. Arun and Bala R. Iyer DATE : 13 August 2018 to 24 August 2018 VENUE : Madhava Lecture Hall, ICTS, Bangalore This school is part of the annual ICTS summer schools on gravitational-wave (GW) astronomy. Recent observations of GW signals from coalesci
From playlist Summer School on Gravitational-Wave Astronomy - 2018
Fundamental of Continuous Gravitational Wave Data Analysis by Karl Wette
WORKSHOP: LISC - Continuous Gravitational Waves Workshop (Virtual) Date: 25-27 October 2021 Venue: Online Speaker: Karl Wette (Australian National University) License:- This lecture is a part of Continuous Gravitational Waves Workshop 2021 held by LIGO India Scientific Collaboration(LISC
From playlist LISC Continuous Gravitational Waves Workshop 2021
End Points | History and Philosophy of Astronomy 10.06
Learn about the history and philosophy of astronomy from Professor Impey, a University Distinguished Professor of Astronomy at the University of Arizona, with our Knowing the Universe: History and Philosophy of Astronomy course here on YouTube. This video is part of module 10, Stars and At
From playlist History and Philosophy Course Module 10: Stars and Atoms
1. Radiation History to the Present — Understanding the Discovery of the Neutron
MIT 22.01 Introduction to Nuclear Engineering and Ionizing Radiation, Fall 2016 Instructor: Michael Short View the complete course: https://ocw.mit.edu/22-01F16 YouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP61FVzAxBP09w2FMQgknTOqu A brief summary of the discovery of f
From playlist MIT 22.01 Introduction to Nuclear Engineering and Ionizing Radiation, Fall 2016
Physics and astrophysics....(Course 2 - EM counterparts) - Lecture 5 by Kenta Hotokezaka
ORGANIZERS : Parameswaran Ajith, K. G. Arun and Bala R. Iyer DATE : 13 August 2018 to 24 August 2018 VENUE : Madhava Lecture Hall, ICTS, Bangalore This school is part of the annual ICTS summer schools on gravitational-wave (GW) astronomy. Recent observations of GW signals from coalesci
From playlist Summer School on Gravitational-Wave Astronomy - 2018
Gravitational Waves - Nergis Mavalvala
General Relativity at 100: Institute for Advanced Study and Princeton University Celebrate the Enduring Reach, Power and Mysteries of Einstein’s Theory Nergis Mavalava - November 5, 2015 https://www.ias.edu/gr100 Albert Einstein’s general theory of relativity, a pillar of modern physics
From playlist General Relativity at 100
Physics demonstrations. Polarisation of microwaves
This video shows how you can use a microwave transmitter and receiver to investigate the polarisation of microwaves. Plane polarised waves are emitted by the transmitter and If you measure the angle of the filter and record the intensity at the receiver you can then show.
From playlist WAVES
Answer to Cosmos to Atom questions (Module 8) from HSC 2009
I go through a range of HSC style questions (a total of 25 marks worth) that relate to Module 8 of the NSW HSC Physics course from the 2009 paper. These questions mainly cover the structure of atom and the historical models, , nuclear physics and particle physics Like what I do? Support
From playlist HSC Physics Exam Questions