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Message ID: 14     Entry time: Fri May 7 17:50:31 2021
Author: Nina Vaidya & Shruti Maliakal 
Type: General 
Category: Design specs 
Subject: Arm Cavity Design 2021 update 

Here are the final slides with all the results on the Arm Cavity Design, please review. 

For RoC of 56.2 +/- 1% things are working well. Tolerance of 0.5% will be better however, 1% is still working; as long as we do not want any peaks ~50kHz away.

For length, 38+0.5% = 38.19 (with RoC 56.2) not ideal, peak is close (48.8kHz) but maybe ok? @Rana thoughts? and 38-0.5% = 37.81 (with RoC 56.2) works well.

To summarise the design:

RoC = 56.2 +/- 1%

L = 38 +/- 0.5%

Attachment 1: Arm_Cavity_Design_05072021_with_tolerances.pptx  37.538 MB  Uploaded Fri May 7 18:57:05 2021
Attachment 2: HOMhelper.py  2 kB  Uploaded Fri May 7 18:58:56 2021  | Hide | Hide all
def add_cavmodel(kat, T=0.001, Loss=5e-6, theta=60, L_rt = 2*12.240, R_c = 20, f1 = 11e6, gamma1 = 0, f2 = 55e6, gamma2 = 0):
    '''
    T: Transmission of mirror (ITM)
    Loss: Loss of mirror ETM
    L_rt: Round trip length of cavity
    R_c: Radius of curvature of ETM
    
    '''
    
    
... 98 more lines ...
Attachment 3: Arm_HOManalysis.ipynb  617 kB  Uploaded Fri May 7 18:59:57 2021  | Hide | Hide all
{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 376,
   "metadata": {},
   "outputs": [],
   "source": [
    "from pykat import finesse\n",
    "from pykat.commands import *\n",
... 617 more lines ...
Attachment 4: HOMplot.py  5 kB  Uploaded Fri May 7 19:00:10 2021  | Hide | Hide all
import numpy as np
import scipy.constants as scc
import matplotlib as mpl, matplotlib.pyplot as plt
from matplotlib import cm

plt.rcParams.update({'text.usetex': False,
                     'lines.linewidth': 2,
                     'font.family': 'serif',
                     'font.serif': 'Georgia',
                     'font.size': 22,
... 132 more lines ...
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