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5  <title>Description of physics_quantumlifetime</title>
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19
20<h1>physics_quantumlifetime
21</h1>
22
23<h2><a name="_name"></a>PURPOSE <a href="#_top"><img alt="^" border="0" src="../../../up.png"></a></h2>
24<div class="box"><strong>physics_quantum_lifetime - computes quantum lifetime</strong></div>
25
26<h2><a name="_synopsis"></a>SYNOPSIS <a href="#_top"><img alt="^" border="0" src="../../../up.png"></a></h2>
27<div class="box"><strong>function tau_q = physics_quantumlifetime(epsilon_RF,sigma_epsilon,tau_epsilon) </strong></div>
28
29<h2><a name="_description"></a>DESCRIPTION <a href="#_top"><img alt="^" border="0" src="../../../up.png"></a></h2>
30<div class="fragment"><pre class="comment"> physics_quantum_lifetime - computes quantum lifetime
31
32  INPUTS
33  1. epsilon_RF - RF acceptance
34  2. sigma_epsilon - Energy spread
35  3. tau_epsilon - Longitudinal damping time
36
37  OUPUTS
38  1. tau_q - Quantum lifetime in s
39
40  See Also ...</pre></div>
41
42<!-- crossreference -->
43<h2><a name="_cross"></a>CROSS-REFERENCE INFORMATION <a href="#_top"><img alt="^" border="0" src="../../../up.png"></a></h2>
44This function calls:
45<ul style="list-style-image:url(../../../matlabicon.gif)">
46</ul>
47This function is called by:
48<ul style="list-style-image:url(../../../matlabicon.gif)">
49<li><a href="physics_booster.html" class="code" title="function physics_booster">physics_booster</a>    </li></ul>
50<!-- crossreference -->
51
52
53<h2><a name="_source"></a>SOURCE CODE <a href="#_top"><img alt="^" border="0" src="../../../up.png"></a></h2>
54<div class="fragment"><pre>0001 <a name="_sub0" href="#_subfunctions" class="code">function tau_q = physics_quantumlifetime(epsilon_RF,sigma_epsilon,tau_epsilon)</a>
550002 <span class="comment">% physics_quantum_lifetime - computes quantum lifetime</span>
560003 <span class="comment">%</span>
570004 <span class="comment">%  INPUTS</span>
580005 <span class="comment">%  1. epsilon_RF - RF acceptance</span>
590006 <span class="comment">%  2. sigma_epsilon - Energy spread</span>
600007 <span class="comment">%  3. tau_epsilon - Longitudinal damping time</span>
610008 <span class="comment">%</span>
620009 <span class="comment">%  OUPUTS</span>
630010 <span class="comment">%  1. tau_q - Quantum lifetime in s</span>
640011 <span class="comment">%</span>
650012 <span class="comment">%  See Also ...</span>
660013
670014 <span class="comment">%</span>
680015 <span class="comment">% Written by Laurent S. Nadolski</span>
690016
700017 xi = power(epsilon_RF,2)/2./power(sigma_epsilon,2);
710018
720019 tau_q = tau_epsilon/2./xi.*exp(xi);</pre></div>
73<hr><address>Generated on Mon 21-May-2007 15:35:27 by <strong><a href="http://www.artefact.tk/software/matlab/m2html/">m2html</a></strong> &copy; 2003</address>
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