tdehaeze/attocube-test-bench
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Update one figure

Browse Source
This commit is contained in:
Thomas Dehaeze 2020-11-02 16:07:01 +01:00
parent 40cb3408d7
commit 285b2e8e35
2 changed files with 46 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
figs/psd_combined.pdf
View File

@ -3,7 +3,7 @@
1 0 obj
<<
/Producer (Apache FOP Version 2.4.0-SNAPSHOT: PDFDocumentGraphics2D)
/CreationDate (D:20201102155534+01'00')
/CreationDate (D:20201102160642+01'00')
>>
endobj
2 0 obj
@ -1333,7 +1333,7 @@ trailer
<<
/Root 133 0 R
/Info 1 0 R
/ID [<21DC2DF519CD1EA75EE5D58AA55D2A26> <21DC2DF519CD1EA75EE5D58AA55D2A26>]
/ID [<8297224F01A981397E48615303310A60> <8297224F01A981397E48615303310A60>]
/Size 134
>>
startxref

88
index.html
View File

@ -3,7 +3,7 @@
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">
<head>
<!-- 2020-11-02 lun. 16:03 -->
<!-- 2020-11-02 lun. 16:06 -->
<meta http-equiv="Content-Type" content="text/html;charset=utf-8" />
<title>Attocube - Test Bench</title>
<meta name="generator" content="Org mode" />
@ -35,45 +35,45 @@
<h2>Table of Contents</h2>
<div id="text-table-of-contents">
<ul>
<li><a href="#org301870a">1. Estimation of the Spectral Density of the Attocube Noise</a>
<li><a href="#orga021312">1. Estimation of the Spectral Density of the Attocube Noise</a>
<ul>
<li><a href="#orga74fad8">1.1. Long and Slow measurement</a></li>
<li><a href="#org594bfe8">1.2. Short and Fast measurement</a></li>
<li><a href="#orgd9ca1ad">1.3. Obtained Amplitude Spectral Density of the measured displacement</a></li>
<li><a href="#orgb20f98b">1.1. Long and Slow measurement</a></li>
<li><a href="#org8254ac0">1.2. Short and Fast measurement</a></li>
<li><a href="#orgaf51073">1.3. Obtained Amplitude Spectral Density of the measured displacement</a></li>
</ul>
</li>
<li><a href="#orgacf938d">2. Effect of the &ldquo;bubble sheet&rdquo; and <b>Aluminium tube</b></a>
<li><a href="#orgf208589">2. Effect of the &ldquo;bubble sheet&rdquo; and <b>Aluminium tube</b></a>
<ul>
<li><a href="#org30a0a1b">2.1. Aluminium Tube and Bubble Sheet</a></li>
<li><a href="#orgfe4b4f1">2.2. Only Aluminium Tube</a></li>
<li><a href="#org5d943ee">2.3. Nothing</a></li>
<li><a href="#org6b21819">2.4. Comparison</a></li>
<li><a href="#org90b8461">2.1. Aluminium Tube and Bubble Sheet</a></li>
<li><a href="#org1034139">2.2. Only Aluminium Tube</a></li>
<li><a href="#orgdc4cc8b">2.3. Nothing</a></li>
<li><a href="#org9dbca5a">2.4. Comparison</a></li>
</ul>
</li>
</ul>
</div>
</div>
<div id="outline-container-org301870a" class="outline-2">
<h2 id="org301870a"><span class="section-number-2">1</span> Estimation of the Spectral Density of the Attocube Noise</h2>
<div id="outline-container-orga021312" class="outline-2">
<h2 id="orga021312"><span class="section-number-2">1</span> Estimation of the Spectral Density of the Attocube Noise</h2>
<div class="outline-text-2" id="text-1">
<div id="org90d970d" class="figure">
<div id="org978e5bd" class="figure">
<p><img src="figs/test-bench-shematic.png" alt="test-bench-shematic.png" />
</p>
<p><span class="figure-number">Figure 1: </span>Test Bench Schematic</p>
</div>
<div id="org2b65a6c" class="figure">
<div id="orga979324" class="figure">
<p><img src="figs/IMG-7865.JPG" alt="IMG-7865.JPG" />
</p>
<p><span class="figure-number">Figure 2: </span>Picture of the test bench. The Attocube and mirror are covered by a &ldquo;bubble sheet&rdquo;</p>
</div>
</div>
<div id="outline-container-orga74fad8" class="outline-3">
<h3 id="orga74fad8"><span class="section-number-3">1.1</span> Long and Slow measurement</h3>
<div id="outline-container-orgb20f98b" class="outline-3">
<h3 id="orgb20f98b"><span class="section-number-3">1.1</span> Long and Slow measurement</h3>
<div class="outline-text-3" id="text-1-1">
<p>
The first measurement was made during ~17 hours with a sampling time of \(T_s = 0.1\,s\).
@ -86,14 +86,14 @@ Ts = 0.1; <span class="org-comment">% [s]</span>
</div>
<div id="org64c5513" class="figure">
<div id="org5b16cc1" class="figure">
<p><img src="figs/long_meas_time_domain_full.png" alt="long_meas_time_domain_full.png" />
</p>
<p><span class="figure-number">Figure 3: </span>Long measurement time domain data</p>
</div>
<p>
Let&rsquo;s fit the data with a step response to a first order low pass filter (Figure <a href="#orgc356556">4</a>).
Let&rsquo;s fit the data with a step response to a first order low pass filter (Figure <a href="#orgf3ec0e8">4</a>).
</p>
<div class="org-src-container">
@ -117,17 +117,17 @@ The corresponding time constant is (in [h]):
<div id="orgc356556" class="figure">
<div id="orgf3ec0e8" class="figure">
<p><img src="figs/long_meas_time_domain_fit.png" alt="long_meas_time_domain_fit.png" />
</p>
<p><span class="figure-number">Figure 4: </span>Fit of the measurement data with a step response of a first order low pass filter</p>
</div>
<p>
We can see in Figure <a href="#org64c5513">3</a> that there is a transient period where the measured displacement experiences some drifts.
We can see in Figure <a href="#org5b16cc1">3</a> that there is a transient period where the measured displacement experiences some drifts.
This is probably due to thermal effects.
We only select the data between <code>t1</code> and <code>t2</code>.
The obtained displacement is shown in Figure <a href="#orgb851634">5</a>.
The obtained displacement is shown in Figure <a href="#org7a26e27">5</a>.
</p>
<div class="org-src-container">
@ -141,7 +141,7 @@ t = t <span class="org-type">-</span> t(1);
</div>
<div id="orgb851634" class="figure">
<div id="org7a26e27" class="figure">
<p><img src="figs/long_meas_time_domain_zoom.png" alt="long_meas_time_domain_zoom.png" />
</p>
<p><span class="figure-number">Figure 5: </span>Kept data (removed slow drifts during the first hours)</p>
@ -176,8 +176,8 @@ f_1 = f_1(f_1 <span class="org-type">&lt;</span> 2);
</div>
</div>
<div id="outline-container-org594bfe8" class="outline-3">
<h3 id="org594bfe8"><span class="section-number-3">1.2</span> Short and Fast measurement</h3>
<div id="outline-container-org8254ac0" class="outline-3">
<h3 id="org8254ac0"><span class="section-number-3">1.2</span> Short and Fast measurement</h3>
<div class="outline-text-3" id="text-1-2">
<p>
An second measurement is done in order to estimate the high frequency noise of the interferometer.
@ -196,11 +196,11 @@ Ts = 1e<span class="org-type">-</span>4; <span class="org-comment">% [s]</span>
</div>
<p>
The time domain measurement is shown in Figure <a href="#orged82baf">6</a>.
The time domain measurement is shown in Figure <a href="#orgcde3d83">6</a>.
</p>
<div id="orged82baf" class="figure">
<div id="orgcde3d83" class="figure">
<p><img src="figs/short_meas_time_domain.png" alt="short_meas_time_domain.png" />
</p>
<p><span class="figure-number">Figure 6: </span>Time domain measurement with the high sampling rate</p>
@ -217,15 +217,15 @@ The Power Spectral Density of the measured displacement is computed
</div>
</div>
<div id="outline-container-orgd9ca1ad" class="outline-3">
<h3 id="orgd9ca1ad"><span class="section-number-3">1.3</span> Obtained Amplitude Spectral Density of the measured displacement</h3>
<div id="outline-container-orgaf51073" class="outline-3">
<h3 id="orgaf51073"><span class="section-number-3">1.3</span> Obtained Amplitude Spectral Density of the measured displacement</h3>
<div class="outline-text-3" id="text-1-3">
<p>
The computed ASD of the two measurements are combined in Figure <a href="#org5032549">7</a>.
The computed ASD of the two measurements are combined in Figure <a href="#org9da7f60">7</a>.
</p>
<div id="org5032549" class="figure">
<div id="org9da7f60" class="figure">
<p><img src="figs/psd_combined.png" alt="psd_combined.png" />
</p>
<p><span class="figure-number">Figure 7: </span>Obtained Amplitude Spectral Density of the measured displacement</p>
@ -234,19 +234,19 @@ The computed ASD of the two measurements are combined in Figure <a href="#org503
</div>
</div>
<div id="outline-container-orgacf938d" class="outline-2">
<h2 id="orgacf938d"><span class="section-number-2">2</span> Effect of the &ldquo;bubble sheet&rdquo; and <b>Aluminium tube</b></h2>
<div id="outline-container-orgf208589" class="outline-2">
<h2 id="orgf208589"><span class="section-number-2">2</span> Effect of the &ldquo;bubble sheet&rdquo; and <b>Aluminium tube</b></h2>
<div class="outline-text-2" id="text-2">
<div id="orgd503177" class="figure">
<div id="org6dff032" class="figure">
<p><img src="figs/IMG-7864.JPG" alt="IMG-7864.JPG" />
</p>
<p><span class="figure-number">Figure 8: </span>Aluminium tube used to protect the beam path from disturbances</p>
</div>
</div>
<div id="outline-container-org30a0a1b" class="outline-3">
<h3 id="org30a0a1b"><span class="section-number-3">2.1</span> Aluminium Tube and Bubble Sheet</h3>
<div id="outline-container-org90b8461" class="outline-3">
<h3 id="org90b8461"><span class="section-number-3">2.1</span> Aluminium Tube and Bubble Sheet</h3>
<div class="outline-text-3" id="text-2-1">
<div class="org-src-container">
<pre class="src src-matlab">load(<span class="org-string">'./mat/long_test_plastic.mat'</span>);
@ -267,8 +267,8 @@ Ts = 1e<span class="org-type">-</span>4; <span class="org-comment">% [s]</span>
</div>
</div>
<div id="outline-container-orgfe4b4f1" class="outline-3">
<h3 id="orgfe4b4f1"><span class="section-number-3">2.2</span> Only Aluminium Tube</h3>
<div id="outline-container-org1034139" class="outline-3">
<h3 id="org1034139"><span class="section-number-3">2.2</span> Only Aluminium Tube</h3>
<div class="outline-text-3" id="text-2-2">
<div class="org-src-container">
<pre class="src src-matlab">load(<span class="org-string">'./mat/long_test_alu_tube.mat'</span>);
@ -282,7 +282,7 @@ Ts = 1e<span class="org-type">-</span>4; <span class="org-comment">% [s]</span>
</div>
<p>
The time domain measurement is shown in Figure <a href="#orged82baf">6</a>.
The time domain measurement is shown in Figure <a href="#orgcde3d83">6</a>.
</p>
<div class="org-src-container">
<pre class="src src-matlab">win = hann(ceil(length(x)<span class="org-type">/</span>10));
@ -292,15 +292,15 @@ The time domain measurement is shown in Figure <a href="#orged82baf">6</a>.
</div>
</div>
<div id="outline-container-org5d943ee" class="outline-3">
<h3 id="org5d943ee"><span class="section-number-3">2.3</span> Nothing</h3>
<div id="outline-container-orgdc4cc8b" class="outline-3">
<h3 id="orgdc4cc8b"><span class="section-number-3">2.3</span> Nothing</h3>
</div>
<div id="outline-container-org6b21819" class="outline-3">
<h3 id="org6b21819"><span class="section-number-3">2.4</span> Comparison</h3>
<div id="outline-container-org9dbca5a" class="outline-3">
<h3 id="org9dbca5a"><span class="section-number-3">2.4</span> Comparison</h3>
<div class="outline-text-3" id="text-2-4">
<div id="org2d3dd04" class="figure">
<div id="org3fc64bb" class="figure">
<p><img src="figs/asd_noise_comp_bubble_aluminium.png" alt="asd_noise_comp_bubble_aluminium.png" />
</p>
<p><span class="figure-number">Figure 9: </span>Comparison of the noise ASD with and without bubble sheet</p>
@ -311,7 +311,7 @@ The time domain measurement is shown in Figure <a href="#orged82baf">6</a>.
</div>
<div id="postamble" class="status">
<p class="author">Author: Dehaeze Thomas</p>
<p class="date">Created: 2020-11-02 lun. 16:03</p>
<p class="date">Created: 2020-11-02 lun. 16:06</p>
</div>
</body>
</html>