ELOG DESPEC

AIDA GELINA BRIKEN nToF CRIB ISOLDE CIRCE nTOFCapture DESPEC DTAS EDI_PSA 179Ta CARME StellarModelling DCF K40

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Entry time:

Thu Mar 3 08:45:03 2022

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<h1>Pulser spectra</h1>

<ul>
	<li>Changes to the nn pulser circuit yesterday have improved the peak widths on the p+n side</li>
	<li>p+n peak widths averact around 100 channels</li>
	<li>n+n around 1000 at 0xa threshold</li>
	<li>n+n 1.8.L spectra - attachment 1</li>
	<li>p+n 1.8.L spectra attachment 2</li>
</ul>

<h2>p+n peak widths</h2>

<table border="1" cellpadding="1" cellspacing="1" style="height:364px; width:246px">
	<thead>
		<tr>
			<th scope="col">FEE</th>
			<th scope="col">Width</th>
		</tr>
	</thead>
	<tbody>
		<tr>
			<td>9</td>
			<td>105</td>
		</tr>
		<tr>
			<td>1</td>
			<td>82</td>
		</tr>
		<tr>
			<td>10</td>
			<td>71</td>
		</tr>
		<tr>
			<td>11</td>
			<td>79</td>
		</tr>
		<tr>
			<td>3</td>
			<td>96</td>
		</tr>
		<tr>
			<td>12</td>
			<td>72</td>
		</tr>
		<tr>
			<td>13</td>
			<td>191</td>
		</tr>
		<tr>
			<td>5</td>
			<td>101</td>
		</tr>
		<tr>
			<td>14</td>
			<td>129</td>
		</tr>
		<tr>
			<td>15</td>
			<td>118</td>
		</tr>
		<tr>
			<td>7</td>
			<td>110</td>
		</tr>
		<tr>
			<td>16</td>
			<td>
			<p>100</p>
			</td>
		</tr>
	</tbody>
</table>

<h2>n+n peak widths</h2>

<table border="1" cellpadding="1" cellspacing="1" style="height:132px; width:272px">
	<thead>
		<tr>
			<th scope="col">FEE</th>
			<th scope="col">Width</th>
		</tr>
	</thead>
	<tbody>
		<tr>
			<td>2</td>
			<td>1200</td>
		</tr>
		<tr>
			<td>4</td>
			<td>1179</td>
		</tr>
		<tr>
			<td>6</td>
			<td>-</td>
		</tr>
		<tr>
			<td>8</td>
			<td>1813</td>
		</tr>
	</tbody>
</table>

<h1>Daily checks</h1>

<ul>
	<li>Fee temperatures ok - attachment 3</li>
	<li>Bias and leakage currents ok - attachment 4</li>
	<li>Stats spectra with current grounding - attachment 5
	<ul>
		<li>Current grounding is just a cable going between each adaptor board and its respective FEE</li>
		<li>Interfee grounding done by power supply and also pulser circuit</li>
	</ul>
	</li>
	<li>Rates for each of the asics - attachment 6</li>
	<li>p+n waveforms - attachment 7</li>
	<li>n+n waveforms - attachment 8
	<ul>
		<li>Lots of noise evident on them</li>
	</ul>
	</li>
</ul>

<h1>Plans for the day</h1>

<ul>
	<li>Connect FEEs up to the copper earth bars installed</li>
	<li>Powercycle and check noise levels</li>
	<li>If n+n remains significantly higher investigate the n+n pulser circuit further</li>
	<li>Investigate the effects of different jumper connetions At present n+n have all LK jumpers on and p+n have lk2-4</li>
</ul>

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