Fusion Definition and 834 Threads

As per a previous thread, if you fire two plasma jets of deuterium at each other at high enough relative velocity, the deuterons would collide and fuse into helium. Does anyone know what is the relative velocity in kilometers per hour necessary for deuterons hitting each other head on to fuse...

[b]1. Calculate the minimum amount of NRG, in joules required to completely melt 130g of silver initially at 15 degrees Celsius. [b]2. ? Q = mC (Tf-Ti) + mHf? saw it online somewhere, not sure what the proper formula for this problem is, and if it is done does everything need to be converted to...

I invite you to take a new look at http://focusfusion.org/" After a long search for funding, Eric Lerner and his team from LPP are really on the move now, constructing a new, most powerful DPF (Dense Plasma Focus) machine, exclusively devoted to fusion research, that should deliver a...

If you combined these elements does it decrease the nuclear fusion reaction because of the fission or do i have this all mixed up??

Hello all, I cam across this company on the web and was very suprised to see that a company is trying to market a different style of fusion reactor. I only knew of the tokamak geometry and of the large scale fusion reactor projects like ITER. Ayone else see this...

Hello, I am curious about fusion reaction cross sections, and fusion power in general, and have been trying to self-teach myself in this area. I saw some emprical data for cross section curves in a paper that I read recently, and thought I understood enough of what made the curve (cross...

I was reading this "almost-a-real-article" in Popular Mechanics and came across the following extract http://www.popularmechanics.com/science/earth/4322757.html Which, to my layman's ear, sounded absolutely fantastic until I read one of the comments Now, it seems that...

Homework Statement The sun is powered by fusion, with four protons fusing together to form a helium nucleus (two of the protons turn into neutrons) and, in the process, releasing a large amount of thermal energy. The process happens in several steps, not all at once. In one step, two protons...

Hey everyone, I am not knowledgeable in the field of physics, so please excuse me if my question is obvious or poorly worded. I have found myself reading recently about various Nuclear Fusion research, and just now I came across an overview of fusion contained by lasers, specifically at the...

If elements like uranium and thorium in fact did form the same way helium and carbon-iron do, which is through fusion. would we be able to know? Is there a way to tell if those elements are forming through fusion in the cores of stars? Like would it be possible to analyze the light coming from...

Hello All I've got two years left in my Physics undergrad degree at a university in Ontario, Canada. My ultimate career goal is to do research in fusion energy, and I've just started looking into what steps I should take to get there, starting with grad school. Naturally, I have some...

Fusion raction produces high energy neutrons which cause activation of the walls of the reactor. Why can't their energy be collected by, for example, a microwave beam?

I found this presentation on Fusion Propulsion here: http://fti.neep.wisc.edu/presentations/jfs_jannaf_1205.pdf" The Gas Dynamic Mirror seemed the most interesting and I got a lot of Google hits on it, but here are some guys working on actual proof of concept hardware...

More failure and disappointment for something that was so promising Notice the last statement. So it doesn't have enough money because commodity prices have gone up so much, wouldn't scaling it back starve the project even more? We need real commitment people, it's starting to look more...

I'm a science fiction writer, currently I write a novel related to laser fusion. As I know in chemistry, catalysis is the process in which the rate of a chemical reaction is either increased or decreased by means of a chemical substance known as a catalyst. Are there catalysts in the nuclear...

I came up with this during idle afternoon. Don't know if it's worth something but I wanted to discuss it with someone. Basically, outline of business part is given on the picture Horizontal tori are basically tokamaks and vertical pipes are "fusion combustion chambers" where working fluid...

I have been researching about fusion power to understand how it operates during thermonuclear reactions. I do not understand how and how much deuterium and tritium are placed into the magnetic confinement (tokomak). I appreciate it, if anyone guides me about this. Thank you

Equation Needed to Figure Resulting Kinetic Energy and Velocities from Fusion... Homework Statement Hey, I am have the initial velocities and masses of nuclei involved in fusion, and am trying to figure out the resulting velocities and kinetic energies. Since this is an inelastic reaction...

Homework Statement Were doing this lab that is related to finding the specific heat and heat of fusion of water. To put the lab simply we filled aluminum calorimeters with water that's around 35°C. After that we took a handful of ice and it into the calorimeter full of water and measured the...

I need someone who has been keeping an eye on the biological literature. It is by now an established fact that the human chromosome 2 originated as a fusion of two chimpanzee chromosomes (and I'm not about to dispute that, this post is in no way an advocacy of intelligent design :)) There are...

Hi All Just wondering why does deuterium fused with itself not make helium-4 - instead it makes a triton or a helion and a proton or a neutron. These products could then fuse with deuterium to make helium-4. What stops deuterium from fusing straight into alpha particles? Is the kinetic...

Homework Statement Determine the specific latent heat of fusion of ice given the amount of time it takes the ice to melt (150 seconds). Energy is supplied to the ice at 530 W. The sample is .25 kg. Homework Equations Q= ml The Attempt at a Solution (Time * 530W) = .25kg * L 150...

http://www.cbsnews.com/video/watch/?id=4955212n So, what should one make of this? I would love to hear what people here with physics know-how think about both the people and the experiments. k

How big is the step from a fission bomb to a fusion bomb?Do you simply put H next to some fission bombs?

http://news.yahoo.com/s/space/20090408/sc_space/friendlydeathstarlasertorecreatesunspower

Homework Statement One of the thermonuclear or fusion reactions that takes place inside a star such as our Sun is the production of helium-3 (3He, with two protons and one neutron) and a gamma ray (high-energy photon, denoted by the lowercase Greek letter gamma, ) in a collision between a...

Here is the link to the Navy publication where they claim "evidence" of LENR--fusion at low activation energy input. http://www.newenergytimes.com/Library2/2008/2008BossTripleTracks.pdf Edit: and see here news release of American Chemical Society presentation...

I know from reading that when the core from a massive star is transformed into iron through the process of nuclear fusion that the star collapses because the newly formed iron core does not put out any energy to support the weight of the star. My question is, why is iron like this when it is...

http://news.yahoo.com/s/afp/20090324/ts_alt_afp/usscienceenergynuclear I guess we'll have to wait and see... Looks like it is being presented at the spring ACS meeting right now.

Hi, I was wondering: why in hydrogen fusion are neutrinos ejected? why in fission does the neutron actually knock over neutrons out of atoms the nucleon are held together in the nuceus by nuclear forces which over power electrostatic forces. But what actually generates these forces? Are...

So it seems real obvious to me at the moment that if quantum teleportation becomes common day, then one huge benefit is fusing two hydrogen nuclei by teleporting them at the same location, or very close to each other. Is this a correct assumption, or is this question completely lacking...

I did a lab experiment were we measured the latent heat of fusion of ice but I am not quite sure what that is. I read that latent heat of fusion is the energy(heat) it takes to change liquid to solid. Is that true? Why would it take heat to freeze something?

Homework Statement The question is: a 6 pack of cola cans contains m grams of liquid. you want to put ice into a perfectly insulated box to cool it down from Ts to Tf. The ice initially has temp Ti. So (a)how much ice would you need as a minimum. (ignore presence of cans and final state of...

[b]1. I need to find the latent heat of fusion of ice. The problem scenario is that i have a cup and fill it 1/3 full with water. I then take a cube of ice and put it in the cup. then the cube of ice melts mass of the cup=.24g mass of the cup when filled 1/3 with water=71.16g initial...

Would it be feasible theoretically to use a continuous endothermic fusion reaction as a high-energy heat sink? Would such a process be capable of producing unstable isotopes for use in nuclear fission? I ask this as a science fiction writer and I would dearly love input and even direction or...

I have long wondered if you could combine fusion reactors with fission reactors. After all fusion produces large numbers of neutrons which can drive fission reactions. Then I saw this: http://www.physorg.com/news152284917.html So will this work? Is a combination of PWR and these things...

Is this reaction possible , i mean bombarding a 1H target with an electron to form a neutron that's all what i want to know

Homework Statement How much ice (in grams) would have to melt to lower the temperature of 351 ml of water from 24 deg C to 5 deg C? (Assume the density of water is 1.0g/ml .) Homework Equations q=mc(deltaT) The Attempt at a Solution m=351 g c=4.18J/g*C deltaT=19deg C...

Which nuclear process is more economically feasible--fusion or fission? I think it's fusion because it produces more energy than it takes, as compared to fission. Am I right?

even if sustained nuclear fusion via deuterium-tritium type reactions were possible, and the energy that is released exceeds the energy that is put in, and this energy is harnessed as a conventional water-steam generator, would such a design be commericially viable, based on the current cost of...

I just read an article in the most recent Popular Science about a company, General Fusion, claiming that they would have fusion reactors with net power in FIVE YEARS. Of course, this sent alarm bells off in my head, and I'm wondering if there is any legitimacy to what they're doing, or if...

Homework Statement An ice tray containing 200 g of water at 25 degrees celecius is placed in the freezer. How much heat energy has to be removed to change the water into ice at -4 degrees celcius? Homework Equations Q= mc(Tf-Ti) + MLf + mc(Tf-Ti) The Attempt at a Solution I know...

I have often seen it quoted that above the mass of 13 Jupiters, Deuterium fusion is able to begin. Is this because the gravitational field of the planetary body is strong enough to give the molecules enough kinetic energy to overcome the Coulomb barrier and fuse?

What is the cheapest possible neutron detector? Are there any cheap detectors (for students)? What is the cheapest possible X-ray detector? What is the cheapest possible vacuum pump? How noisy are they? I mean: Does the pumping noise disturb the wall neighbours? Are there any other ways...

Most of us have heard about it. Some of us know a little about it. Little understand it. I am a 17 year old student, competant in the science and maths, (not to toot my own horn, but it is my best area) Is there a physician (no? physicist (damn that word doesn't look right, oh well, you...

Hi all I have to write a short essay on an application of laser technology for a class. I'm keen to write it on ICF but my uni library doesn't have a great deal of material. Can anyone link me to some reputable sources on the internet? thanks

hey guys, I am new here and thought you might like to help me out. I am a first year astronomy student at Curtin University in Western Australia. my current assignment has asked me to calculate the mass of hydrogen converted in the sun to helium and energy over 10 billion years (10 billion...

Hi, I don't know if this is the right place to post. Anyway, the fact is this: http://arxiv.org/PS_cache/nucl-ex/pdf/0701/0701065v1.pdf already published on Instrument and nuclear method B and http://arxiv.org/PS_cache/arxiv/pdf/0805/0805.4538v1.pdf already published on...

I wanted to throw out a question and see what some general consensus/opinion on the Polywell fusion power system is. After I first read about the precursor (Farnsworth fuser) and was initially interested greatly as I had similar thoughts before really researching fusion. Personally, I'm...

Homework Statement It's part of a lab designed to find the specific latent heat of fusion of ice using the method of mixtures. The results are in the 1st attachment..I want to find the specific latent heat of fusion of ice from those nos.Homework Equations heat lost by water = heat gained by...